Weather forecast for 10 daysBoulder, CO
Weather forecast for the weekend
Saturday Oct 17, 2026
- 75°F
- 46°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphSSE 153°
- Humidity: 34%
- UV index: 4
- Sunrise: 7:14 am MDT
- Sunset: 6:18 pm MDT
- details ▼
Today, in Boulder, sunny conditions are expected to continue.
A wide temperature range is predicted, from a high of a warm 75.2°F to a low of a frosty 46.4°F.
Today, the forecasted high will be higher and much closer to September's average high of 72.3°F than October's 57.2°F.
Sunrise will be at 7:14 am and sunset at 6:18 pm; the daylight will last for 11h and 5min.
A wide temperature range is predicted, from a high of a warm 75.2°F to a low of a frosty 46.4°F.
Today, the forecasted high will be higher and much closer to September's average high of 72.3°F than October's 57.2°F.
Sunrise will be at 7:14 am and sunset at 6:18 pm; the daylight will last for 11h and 5min.
Sunday Oct 18, 2026
- 75°F
- 45°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphENE 76°
- Humidity: 24%
- UV index: 4
- Sunrise: 7:15 am MDT
- Sunset: 6:17 pm MDT
- details ▼
On Sunday, October 18, mostly sunny weather is also likely, with high visibility.
Substantial temperature fluctuations from a high of a warm 75.2°F to a low of a chilly 44.6°F are anticipated.
Tomorrow, expect a warmer trend, with a high of 75.2°F more common in September.
Sunrise will be at 7:15 am and sunset at 6:17 pm; tomorrow's daylight will last for 11h and 2min.
Substantial temperature fluctuations from a high of a warm 75.2°F to a low of a chilly 44.6°F are anticipated.
Tomorrow, expect a warmer trend, with a high of 75.2°F more common in September.
Sunrise will be at 7:15 am and sunset at 6:17 pm; tomorrow's daylight will last for 11h and 2min.
10-day overview
Daily temperatures
Maximum temperature: 75°C.
Coldest period: Saturday - Monday 63°C.
Coldest period: Saturday - Monday 63°C.
Chance of precipitation
Highest chance: Saturday 24.10. 36%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- 75°F
- 46°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphSSE 153°
- Humidity: 34%
- UV index: 4
- Sunrise: 7:14 am MDT
- Sunset: 6:18 pm MDT
- details ▼
- Sunday
- Oct 18, 2026
- 75°F
- 45°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphENE 76°
- Humidity: 24%
- UV index: 4
- Sunrise: 7:15 am MDT
- Sunset: 6:17 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 68°F
- 46°F
Partly Cloudy
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 4mphENE 73°
- Humidity: 42%
- UV index: 4
- Sunrise: 7:16 am MDT
- Sunset: 6:15 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 73°F
- 48°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 5mphENE 71°
- Humidity: 42%
- UV index: 4
- Sunrise: 7:17 am MDT
- Sunset: 6:14 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 75°F
- 50°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 6mphESE 104°
- Humidity: 38%
- UV index: 4
- Sunrise: 7:18 am MDT
- Sunset: 6:13 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 73°F
- 54°F
Mostly Cloudy
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 4mphE 101°
- Humidity: 43%
- UV index: 3
- Sunrise: 7:19 am MDT
- Sunset: 6:11 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 72°F
- 48°F
PM Showers
- Precip. probability: 30%
- Precipitation: 0.04"
- Wind: 7mphSW 226°
- Humidity: 41%
- UV index: 4
- Sunrise: 7:20 am MDT
- Sunset: 6:10 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 63°F
- 41°F
Showers
- Precip. probability: 36%
- Precipitation: 0.08"
- Wind: 6mphENE 72°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:21 am MDT
- Sunset: 6:08 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 63°F
- 43°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 5mphE 86°
- Humidity: 51%
- UV index: 4
- Sunrise: 7:22 am MDT
- Sunset: 6:07 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 63°F
- 45°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 5mphENE 61°
- Humidity: 42%
- UV index: 4
- Sunrise: 7:23 am MDT
- Sunset: 6:06 pm MDT
- details ▼
Models point to a combination of overcast, dry and sunny and showery weather is expected.
Rainfall is anticipated on Friday and next Saturday.
There will be a considerable variation in temperature in the coming days. Forecast highs will fluctuate between 62.6°F and 75.2°F, while the nightly low temperatures will show also a considerable swing, as the overnight lows will vary from 41°F to 53.6°F.
With a maximum temperature of 75.2°F, Saturday, Sunday and Wednesday will be the warmest days in Boulder; next Saturday through next Monday, with the highest temperature of 62.6°F, will be the coldest days in Boulder.
Rainfall is anticipated on Friday and next Saturday.
There will be a considerable variation in temperature in the coming days. Forecast highs will fluctuate between 62.6°F and 75.2°F, while the nightly low temperatures will show also a considerable swing, as the overnight lows will vary from 41°F to 53.6°F.
With a maximum temperature of 75.2°F, Saturday, Sunday and Wednesday will be the warmest days in Boulder; next Saturday through next Monday, with the highest temperature of 62.6°F, will be the coldest days in Boulder.
Updated: Oct 17, 2026 @ 10:47:51 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Saturday, sunny and dry conditions are anticipated.
Today, the maximum temperature will be 75.2°F, while the minimum temperature will be 46.4°F.
The highest temperature today will be noticeably higher than the average maximum of 57.2°F in October. Today, the lowest temperature will be also significantly higher than the average low of 35.2°F.
The highest temperature today will be noticeably higher than the average maximum of 57.2°F in October. Today, the lowest temperature will be also significantly higher than the average low of 35.2°F.
On Saturday, in Boulder, sunrise will be at 7:14 am and sunset at 6:18 pm (MDT).
In Boulder, today, there will be 11h and 5min of daylight.
Tomorrow, in Boulder, sunshine will take center stage, with just faint traces of clouds.
Tomorrow, the maximum temperature will be 75.2°F, while the minimum temperature will be 44.6°F.
The maximum temperature tomorrow will be uncommonly higher than the average highest temperature of 57.2°F in October. The lowest temperature tomorrow will be also noticeably higher than the average low of 35.2°F.
The maximum temperature tomorrow will be uncommonly higher than the average highest temperature of 57.2°F in October. The lowest temperature tomorrow will be also noticeably higher than the average low of 35.2°F.
On Sunday, in Boulder, sunrise will be at 7:15 am and sunset at 6:17 pm (MDT).
In Boulder, tomorrow, there will be 11h and 2min of daylight.
