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A team of Denver and Boulder's weather experts At BoulderCAST, our meteorologists understand the nuances of Front Range weather like no one else.

We provide the most detailed and accurate forecasts and weather information for Boulder, the Denver Metro area, and Colorado beyond. Check out our daily forecast discussions, weather model displays, or our cutting-edge forecasts for all the ski resorts and over 120 hiking destinations across the Rocky Mountain State.

08/30/2024

What a beautiful beginning to the holiday weekend! Who needs rain anyway? 🙋‍♂️

08/29/2024

Fresh SUMMER snow in the mountains of Montana overnight, up to six soupy inches in some places! This view is from Logan Pass in Glacier National Park, elevation 6600 feet. Winter is coming... Glacier National Park

08/29/2024

⛰️ Labor Day Weekend Forecast: Warm & dry weather for Denver, just a few storms in the Mountains 🏙️

Labor Day Weekend won’t be quite as hot as it was on Wednesday, which was Boulder’s 40th 90° day of the year, but we are expecting warm and dry conditions to persist, perfect for any outdoor activities you may have lined up. The weather pattern will shift slightly early next week with the potential for isolated storms returning to the area.

Whether you’re planning a trip into the Mountains or are staying comfortably down low in the city this holiday weekend, read on for the latest forecast details --> https://bouldercast.com/labor-day-weekend-forecast-warm-dry-weather-for-denver-just-a-few-storms-in-the-mountains/ Colorado

Labor Day Weekend won’t be quite as hot as it was on Wednesday, which was Boulder’s 40th 90° day of the year, but we are expecting warm and dry conditions to persist, perfect for any outdoor activities you may have lined up. The weather pattern will shift slightly early next week with the poten...

08/28/2024

🌡️ 90-degree day #40 of the year is in the books for !

08/28/2024

Throwback to June 2020 during the infancy of the pandemic. A time when this 150+ mile long Severe Thunderstorm Warning was issued for damaging winds accompanying a massive derecho, the first one in recorded history to hit the Denver area --> https://bouldercast.com/saturdays-historic-colorado-derecho-wind-event-was-one-for-the-record-books/

08/28/2024

*Premium* BoulderCAST Daily – Wed 08/28/24 | A quick trip into the 90s before a weak cold front arrives tonight. Labor Day Weekend continues to look excellent weather-wise --> https://bouldercast.com/bouldercast-daily-wed-08-28-24-a-quick-trip-into-the-90s-before-a-weak-cold-front-arrives-tonight/

⦁❶⦁ A strong storm system is moving along the Canadian Border today, passing well north of Colorado with limited impacts on our weather ⦁❷⦁ Expect sunny skies this morning, but increasing high clouds during the afternoon and evening as subtropical moisture arrives from the south --- high...

08/27/2024

Colorado blue skies today! 🌞

08/27/2024

📊 Boulder is up to 2.22" of rainfall in August, the wettest August for the city since 2008. That will likely be the monthly total as we'll be bone dry the rest of the week. For reference, the entire May-June-July period spit out only 0.97" of rain, an all-time record low...

08/27/2024

*Premium* BoulderCAST Daily – Tue 08/27/24 | A long dry stretch lies ahead for the Front Range beginning today with sunny skies & seasonal temperatures --> https://bouldercast.com/bouldercast-daily-tue-08-27-24-a-long-dry-stretch-lies-ahead-for-the-front-range-beginning-today-with-sunny-skies-seasonal-temperatures/

⦁❶⦁ The shortwave which brought clouds and some raindrops to the area on Monday has shifted off into the Dakotas overnight with drier air pushing into Colorado on its backside ⦁❷⦁ There'll be sunny skies today with no chance for rain and high temperatures in the middle 80s ⦁❸⦁ Tomo...

08/26/2024

Pseudo weather quiz!

Who knows why there are currently two tropical cyclones in the Pacific with "H" names? 😉

08/26/2024

Hurricane Hone passed just 50 miles south of the Big Island of Hawai'i over the weekend, lashing the area with heavy rain/wind. Higher elevations on the SE side of the island saw up to 30" of rain, while less than 0.5" fell on the leeward side of Mauna Loa and Mauna Kea (NW side of island).

Hone is now a tropical storm with 65 MPH sustained winds HIwx

08/26/2024

💦 0.26" of rain fell in last night, now up to 2.19" month-to-date. The slow recovery from (nearly) last place in monsoon rainfall continues. Even better, meteorological Autumn starts this weekend!

08/26/2024

*NEW POST* This Week in Colorado Weather: Drought has improved, but the end of August will be mostly dry 🏜️

Recent monsoon rains have brought some improvement in the ongoing drought across our area. However, the weather this week in the Front Range will largely be focused around the passage of a couple dry cold fronts with minimal rainfall expected. Although temperatures will fluctuate from the upper 70s to the lower 90s at times, most of the week will hover near or slightly above normal. As we head into the upcoming holiday weekend, storm chances will increase somewhat as moisture-rich flow tries to re-exert itself over our area.

All this and more in our latest weekly outlook --> https://bouldercast.com/this-week-in-colorado-weather-august-26-2024/

08/22/2024

🌧️ RADAR UPDATE (THU 4PM): Quite the blob of showers & thunderstorms amassing over the higher terrain southwest of Denver. Expecting these to weaken considerably as they move off the higher terrain, but do plan for some wet weather in the Metro area between now and 7PM!

08/22/2024

Monsoon moisture will persist this weekend, keeping the risk of storms in the forecast as temperatures remain mostly in the 80s. Fire danger increases on Sunday with an approaching trough. This & more in our latest *Premium* weekend outlook --> https://bouldercast.com/this-weekend-in-colorado-weather-monsoon-moisture-will-keep-the-risk-of-storms-in-the-forecast-as-temperatures-remain-mostly-in-the-80s/

⦁❶⦁ A hose of monsoon moisture continues to flow into Colorado from the southwest setting the stage for continued storm activity throughout the extended ⦁❷⦁ Definitively overcast skies Thursday may limit storms, but we're currently expecting a round this afternoon/evening, mainly from 2 ...

08/22/2024

Even cloudy days are beautiful in ! 🙂

08/21/2024

Little to no impact to PM2.5 air quality in the Boulder-Denver area Wednesday morning from the , except in the immediate vicinity in Golden. You may sense a "campfire" smell though in the west/northwest Metro. Getting a bit of that near Broomfield Airport

08/21/2024

☔️ Why will it be much cloudier Wednesday? What time will monsoon thunderstorms arrive today and in the days to come? Where is the western wildfire smoke? This & more in today's *Premium* forecast disco --> https://bouldercast.com/bouldercast-daily-wed-08-21-24-much-cloudier-today-with-late-day-storms-developing-monsoon-moisture-will-remain-over-the-area-through-at-least-friday/

⦁❶⦁ Monsoon moisture continues to rotate northward into Colorado around the edge of high pressure situated in New Mexico ⦁❷⦁ Much more cloudy today with lesser instability and slightly cooler temperatures --- highs close to 90 degrees ⦁❸⦁ There's a 40% chance for showers and storms...

08/20/2024

💦📈 Following an all-time record dry May-July period, things have turned around somewhat in Boulder so far in August. Hoping for this trend to continue this week & that it's more widespread across all of Boulder County where Severe to Extreme Drought is ongoing... COWX

08/20/2024

💦 Monday was officially the wettest day in Boulder in nearly four months with 0.64" of rain dumping in the afternoon monsoon deluge. The last time we saw this much rain in a day was back on April 27th which coincidentally was also the last day it snowed!

August is barely half over but we've already had more rain this month then we had in May, June and July combined!

08/20/2024

*NEW POST* This Week in Colorado Weather: The Southwest Monsoon will remain active ☔️⛈️

The Southwest Monsoon will remain active across Colorado this week with the best chances for rainfall coming Wednesday through Friday in the Front Range. Storm chances will be greatest across the Mountains with better forcing, upslope, and unstable air leading to a slight risk of flash flooding there. Temperatures during the week in the Denver Metro area will remain near or above normal, but fortunately there's nothing too hot.

Here's the latest --> https://bouldercast.com/this-week-in-colorado-weather-august-20-2024/

The Southwest Monsoon will remain active across Colorado this week with the best chances for rainfall coming Wednesday through Friday in the Front Range. Storm chances will be greatest across the Mountains with better forcing, upslope, and unstable air leading to a slight risk of flash flooding ther...

08/19/2024

A monsoon storm slamming (half of) Boulder this afternoon with heavy rain! Gauges indicate that up to 0.75" of rain fell in about 15 minutes across a narrow swath of south !

08/19/2024

⚠️ A strong thunderstorm is coming over the Flatirons now into . Contains heavy rain, lightning and small hail!

08/19/2024

⛈️ Clouds have kept temps a few degrees cooler across the Boulder-Denver area so far (84°F now). This should help keep MOST of the severe weather east of I-25. Still expecting scattered storms through the afternoon and early evening. Big hail + a tornado (or 2) out there

08/19/2024

Colorado's San Juan Mountains are so beautiful in August 😍

08/19/2024

NOTICE: Apologies, due to unforeseen travel, our usual weekly outlook discussion will be published a day later on Tuesday this week.

Monday's weather highlights include severe storms, heavy rain & large hail. See today's short *Premium* update: https://bouldercast.com/bouldercast-daily-mon-08-19-24-large-hail-heavy-rain-will-accompany-monsoon-thunderstorms-monday-drier-but-hot-on-tuesday/

08/17/2024

Current temps at 3:45PM 🥵

08/17/2024

🌡️ The record high temperature for August 17th in is 97 degrees, set 76 years ago in 1948. We may get close to this long-standing record Saturday afternoon.

08/16/2024

✅ Back in the 90s for the first time since August 6th!

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Videos

A monsoon storm slamming (half of) Boulder this afternoon with heavy rain! Gauges indicate that up to 0.75" of rain fell in about 15 minutes across a narrow swath of south #Boulder! #COwx #Monsoon

⚠️ A strong thunderstorm is coming over the Flatirons now into #Boulder. Contains heavy rain, lightning and small hail! #cowx

It was a peaceful Monday morning in western Boulder County before the thunderheads blew up!

☔️ A batch of showers is moving towards the Boulder/Denver area early this morning from the northwest. Likely much of this activity will weaken as it moves off the terrain, but don't be surprised to see a couple sprinkles & continued clouds through Sunday mid-morning #COWX

A very rare double #Fujiwhara interaction in the eastern Pacific as four tropical cyclones exist(ed) within 1000 miles of each other. Fabio & Emilia perform quite the dance before possibly merging in a few days! #NotCOwx

HEADS UP: We've got one last day of clear air in the Front Range before the next round of thick smoke arrives tonight, mainly sourced from mega-fires in California, but there'll be some smoke from the #AlexanderMountainFire as well 🔥💨 Check the latest Colorado smoke forecast --> https://bouldercast.com/colorado-smoke-forecast #COWX

🔥 The #AlexanderMountainFire is already ripping early Tuesday morning west of Loveland. With today's record heat, record dry air, sunny skies, and gusty winds, this fire is unfortunately going to get worse before it gets better.... #COWX #COfire

Things are looking good for the next several days as the main source of smoke to the USA shifts from being Canada to the large fires in the PNW & California. General southwest flow over the Rockies will keep the worst of the smoke north of Colorado through at least Sunday! #COWx

Finally relief is in sight for Colorado! 🥳 Wildfire smoke will remain fairly thick on Thursday but it will largely clear out on Friday! Some minor haze will remain into the weekend but that's the new normal in the West Latest CO smoke forecast: https://bouldercast.com/colorado-smoke-forecast/ #COWx

🔥💨 Here's the ground-level smoke forecast thru Friday morning. Canadian smoke will gradually be lessening today and tomorrow, with more notable improvement on Friday into the weekend. Attention then turns to smoke from the cornucopia of fires in the Pacific Northwest and how they might impact our area in a changing weather pattern. Ugh! #COWX

Current view of a cloud-free, but not smoke-free Colorado Tuesday morning!

Nice little outflow boundary heading towards Denver and Boulder. It's been quiet most of the day, but looking increasingly likely there will be fireworks this evening! Keep an eye out 👀🎆 #cowx

🔥💨 Holy Smokes! Massive wildfires burning across CA, OR, WA, ID, & MT will be supplying moderate to high levels of smoke in the Denver area for the foreseeable future (3-5+ days). Luckily most of the big fires are 700+ miles away instead of on our doorstep!

Both days this weekend will be miserable in the Front Range. Not only will temperatures be in the lower 100s both days, wildfire smoke from Oregon, California, and Montana will fill our skies 😭 Latest Colorado smoke forecast --> https://bouldercast.com/colorado-smoke-forecast #COWx #Smoke #Denver

🌲🔥💨 Colorado currently sits between a plethora of wildfire smoke trapped under the heat dome along the West Coast & smoke coming south from huge fires in Canada. Our current, relatively smoke-free air won't last forever. More smoke enters the picture later this week! #COWx

A cold front, assisted by the outflow from severe storms in far eastern Colorado, will arrive into then Denver Metro area around 9-11PM Saturday evening. As a result, highs on Sunday will be 15-20deg cooler in the middle 70s with scattered late-day storms! Who's ready? 🥳🥶 #COWx

Hurricane Beryl in the Caribbean now has sustained winds of 165 MPH, the earliest recorded Category 5 hurricane in the Atlantic Basin. So beautiful, yet so devastating 🌀 #Beryl

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Your Front Range Weather Team

At BoulderCAST, our meteorologists understand the intricacies of complex terrain and the direct impact it has on Front Range weather. From the mouth of Boulder Canyon, to the towns of Broomfield and Lakewood out on the plains, to the 14,259-foot summit of Longs Peak, we regularly provide the most accurate forecasts and weather information for Boulder, the Denver Metro area, and Colorado beyond.