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Weather in Boulder, Colorado for July 2026

Your guide to Boulder weather in July - trends and predictions

    Official Weather Alert ⚠️

  • Meteorological - Air Quality Alert - See hour by hour.

    • Temperatures

  • So far, July 2026 in Boulder is slightly warmer than the historical average by 1.7 °C.

  • The forecast for the next days in Boulder predicts temperatures to be around 35 °C, close to the historical average.

  • In general, the average temperature in Boulder at the beginning of July is 29.9 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 36 °C by the end of July.

    • Rain 🌧️

  • Boulder experiences moderate rainfall in July, with an average of 8 rainy days and a total precipitation of 25.7 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
23
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
30°/16°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
35 %
Avg humidity

Boulder Weather July

Move between months or click on a day
June
August
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Cloudy
29°
2
Cloudy
30°
3
Sunny
31°
4
Partly cloudy
29°
5
Partly cloudy
30°
6
Sunny
32°
7
Patchy rain possible
28°
8
Sunny
30°
9
Cloudy
31°
10
Overcast
32°
11
Cloudy
32°
12
Sunny
32°
13
Cloudy
34°
14
Partly cloudy
33°
15
Patchy rain possible
33°
16
Moderate rain at times
30°
17
Patchy rain possible
30°
18
Moderate or heavy rain shower
31°
19
Overcast
31°
20
Weather Alert Sunny
37°
21
Sunny
35°
22
Patchy rain possible
31°
23
Sunny
34°
24
Sunny
35°
25
Sunny
37°
26
Sunny
36°
27
Sunny
36°
28
Sunny
37°
29
Sunny
36°
30
Sunny
35°
31
Sunny
35°

Temperatures trend during July in Boulder

See the weather trend as well as the moving average line

July weather in Boulder day by day

Click on a date for more information
June August
Date Weather Temperatures Rain UV More
Jul. 1 Cloudy
Cloudy
 29° /14° 0 mm 9
Jul. 2 Cloudy
Cloudy
 30° /14° 0.6 mm 9
Jul. 3 Sunny
Sunny
 31° /14° 0.1 mm 10
Jul. 4 Partly cloudy
Partly cloudy
 29° /13° 0 mm 10
Jul. 5 Partly cloudy
Partly cloudy
 30° /14° 0 mm 9
Jul. 6 Sunny
Sunny
 32° /15° 0 mm 10
Jul. 7 Patchy rain possible
Patchy rain possible
 28° /13° 0.6 mm 9
Jul. 8 Sunny
Sunny
 30° /13° 0.3 mm 10
Jul. 9 Cloudy
Cloudy
 31° /16° 0.4 mm 10
Jul. 10 Overcast
Overcast
 32° /14° 1.3 mm 9
Jul. 11 Cloudy
Cloudy
 32° /14° 0 mm 9
Jul. 12 Sunny
Sunny
 32° /14° 0 mm 9
Jul. 13 Cloudy
Cloudy
 34° /17° 0 mm 10
Jul. 14 Partly cloudy
Partly cloudy
 33° /18° 0 mm 10
Jul. 15 Patchy rain possible
Patchy rain possible
 33° /18° 0.3 mm 9
Jul. 16 Moderate rain at times
Moderate rain at times
 30° /16° 1.8 mm 9
Jul. 17 Patchy rain possible
Patchy rain possible
 30° /15° 4 mm 9
Jul. 18 Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /15° 1.9 mm 9
Jul. 19 Overcast
Overcast
 31° /16° 0.3 mm 9
Jul. 20 Sunny
Sunny
 37° /18° 0 mm 11.9
Jul. 21 Sunny
Sunny
 35° /18° 1 mm 12
Jul. 22 Patchy rain possible
Patchy rain possible
 31° /15° 12.5 mm 11.4
Jul. 23 Sunny
Sunny
 34° /15° 0.1 mm 9.5
Jul. 24 Sunny
Sunny
 35° /15° 0.9 mm 9
Jul. 25 Sunny
Sunny
 37° /19° 10.2 mm 9
Jul. 26 Sunny
Sunny
 36° /17° 0.6 mm 9
Jul. 27 Sunny
Sunny
 36° /19° 0.9 mm 9
Jul. 28 Sunny
Sunny
 37° /19° 0 mm 9
Jul. 29 Sunny
Sunny
 36° /20° 0.7 mm 9
Jul. 30 Sunny
Sunny
 35° /16° 2.4 mm 8
Jul. 31 Sunny
Sunny
 35° /18° 0.1 mm 8
Next
Important Notice
Our weather forecast for Boulder in July is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Boulder forecast closer to your planned date for the most up-to-date weather information.
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Boulder in July - FAQ

What are the expected maximum and minimum temperatures in Boulder during July?
Expect warm days with temperatures around 30°, cooling to mild conditions of 16° after sunset. Perfect for those who enjoy warm weather.

How much rainfall should be expected in Boulder during July?
In July, Boulder can expect light to moderate rainfall, totaling 25.7 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.

What are the typical wind conditions in Boulder during July?
The average wind speed in Boulder during July is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

July rainfall patterns in Boulder

Explore the daily rainfall trends and prepare for Boulders July weather 💧
Typically, Boulder has 8 rainy days in July with a total of 25.7 mm of rainfall.

UV exposure in Boulder during July

Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️

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Get accurate weather forecasts for Boulder, located at latitude 40.015 and longitude -105.271. Stay updated with localized weather information tailored for Boulder.

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