Boulder County (Boulder)
July
Weather in Boulder County, Colorado for July 2026
Your guide to Boulder County weather in July - trends and predictions
Meteorological - Air Quality Alert - See hour by hour.
So far, July 2026 in Boulder County is slightly warmer than the historical average by 1.7 °C.
The forecast for the next days in Boulder County predicts temperatures to be around 35 °C, close to the historical average.
In general, the average temperature in Boulder County 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.
Boulder County experiences moderate rainfall in July, with an average of 8 rainy days and a total precipitation of 25.7 mm.
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Temperatures
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23
Dry days
8
Rainy days
0
Snow days
30°/16°
Temperatures
22 km/h
Avg max wind
35 %
Avg humidity
Boulder County Weather July
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Temperatures trend during July in Boulder County
See the weather trend as well as the moving average line
July weather in Boulder County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jul. 1 |  Cloudy | 29° /14° | 0 mm | 9 | |
| Jul. 2 | Cloudy | 30° /14° | 0.6 mm | 9 | |
| Jul. 3 |  Sunny | 31° /14° | 0.1 mm | 10 | |
| Jul. 4 |  Partly cloudy | 29° /13° | 0 mm | 10 | |
| Jul. 5 | Partly cloudy | 30° /14° | 0 mm | 9 | |
| Jul. 6 | Sunny | 32° /15° | 0 mm | 10 | |
| Jul. 7 |  Patchy rain possible | 28° /13° | 0.6 mm | 9 | |
| Jul. 8 | Sunny | 30° /13° | 0.3 mm | 10 | |
| Jul. 9 | Cloudy | 31° /16° | 0.4 mm | 10 | |
| Jul. 10 |  Overcast | 32° /14° | 1.3 mm | 9 | |
| Jul. 11 | Cloudy | 32° /14° | 0 mm | 9 | |
| Jul. 12 | Sunny | 32° /14° | 0 mm | 9 | |
| Jul. 13 | Cloudy | 34° /17° | 0 mm | 10 | |
| Jul. 14 | Partly cloudy | 33° /18° | 0 mm | 10 | |
| Jul. 15 | Patchy rain possible | 33° /18° | 0.3 mm | 9 | |
| Jul. 16 |  Moderate rain at times | 30° /16° | 1.8 mm | 9 | |
| Jul. 17 | Patchy rain possible | 30° /15° | 4 mm | 9 | |
| Jul. 18 | Moderate or heavy rain shower | 31° /15° | 1.9 mm | 9 | |
| Jul. 19 | Overcast | 31° /16° | 0.3 mm | 9 | |
| Jul. 20 | Sunny | 37° /18° | 0 mm | 11.9 | |
| Jul. 21 | Sunny | 35° /18° | 1 mm | 12 | |
| Jul. 22 | Patchy rain possible | 31° /15° | 12.5 mm | 11.4 | |
| Jul. 23 | Sunny | 34° /15° | 0.1 mm | 9.5 | |
| Jul. 24 | Sunny | 35° /15° | 0.9 mm | 9 | |
| Jul. 25 | Sunny | 37° /19° | 10.2 mm | 9 | |
| Jul. 26 | Sunny | 36° /17° | 0.6 mm | 9 | |
| Jul. 27 | Sunny | 36° /19° | 0.9 mm | 9 | |
| Jul. 28 | Sunny | 37° /19° | 0 mm | 9 | |
| Jul. 29 | Sunny | 36° /20° | 0.7 mm | 9 | |
| Jul. 30 | Sunny | 35° /16° | 2.4 mm | 8 | |
| Jul. 31 | Sunny | 35° /18° | 0.1 mm | 8 | |
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Important Notice
Our weather forecast for Boulder County 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 County forecast closer to your planned date for the most up-to-date weather information.
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Boulder County in July - FAQ
What are the expected maximum and minimum temperatures in Boulder County 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 County during July?
In July, Boulder County 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 County during July?
The average wind speed in Boulder County during July is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
July rainfall patterns in Boulder County
Explore the daily rainfall trends and prepare for Boulder Countys July weather 💧
Typically, Boulder County has 8 rainy days in July with a total of 25.7 mm of rainfall.
UV exposure in Boulder County during July
Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️
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