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San Juan County (Silverton)
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United States weather

Weather in San Juan County, Colorado for August 2026

Your guide to San Juan County weather in August - trends and predictions

    Official Weather Alert ⚠️

  • Flash Flood Warning - See hour by hour.

    • Temperatures

  • So far, August 2026 in San Juan County is slightly warmer than the historical average by 0.8 °F.

  • The forecast for the next days in San Juan County predicts temperatures to be around 18 °F, close to the historical average.

  • In general, the average temperature in San Juan County at the beginning of August is 19.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.1 °F by the end of August.

    • Rain 🌧️

  • San Juan County experiences moderate rainfall in August, with an average of 8 rainy days and a total precipitation of 111.4 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
16°/9°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
49 %
Avg humidity

San Juan County Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Thundery outbreaks possible
18°
2
Partly cloudy
19°
3
Sunny
19°
4
Cloudy
19°
5
Partly cloudy
19°
6
Sunny
20°
7
Partly cloudy
21°
8
Cloudy
19°
9
Partly cloudy
18°
10
Overcast
16°
11
Partly cloudy
17°
12
Weather Alert Sunny
17°
13
Patchy rain possible
12°
14
Patchy light rain with thunder
12°
15
Patchy rain possible
16°
16
Sunny
17°
17
Partly cloudy
17°
18
Sunny
18°
19
Patchy light rain with thunder
14°
20
Sunny
18°
21
Sunny
21°
22
Sunny
23°
23
Sunny
23°
24
Sunny
23°
25
Sunny
22°
26
Patchy light rain with thunder
11°
27
Moderate or heavy rain with thunder
11°
28
Cloudy
12°
29
Moderate or heavy rain shower
11°
30
Partly cloudy
13°
31
Thundery outbreaks possible
12°

Temperatures trend during August in San Juan County

See the weather trend as well as the moving average line

August weather in San Juan County day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Thundery outbreaks possible
Thundery outbreaks possible
 18° /8° 0.2 mm 10
Aug. 2 Partly cloudy
Partly cloudy
 19° /9° 0.1 mm 11
Aug. 3 Sunny
Sunny
 19° /9° 0.2 mm 11
Aug. 4 Cloudy
Cloudy
 19° /9° 0.4 mm 10
Aug. 5 Partly cloudy
Partly cloudy
 19° /9° 0 mm 11
Aug. 6 Sunny
Sunny
 20° /10° 0 mm 11
Aug. 7 Partly cloudy
Partly cloudy
 21° /10° 0 mm 11
Aug. 8 Cloudy
Cloudy
 19° /9° 0.1 mm 10
Aug. 9 Partly cloudy
Partly cloudy
 18° /10° 0.4 mm 11
Aug. 10 Overcast
Overcast
 16° /10° 2.3 mm 9
Aug. 11 Partly cloudy
Partly cloudy
 17° /8° 2.7 mm 8
Aug. 12 Sunny
Sunny
 17° /10° 7.1 mm 5.3
Aug. 13 Patchy rain possible
Patchy rain possible
 12° /7° 9.4 mm 9.4
Aug. 14 Patchy light rain with thunder
Patchy light rain with thunder
 12° /8° 8.2 mm 8.4
Aug. 15 Patchy rain possible
Patchy rain possible
 16° /9° 0.9 mm 7.3
Aug. 16 Sunny
Sunny
 17° /10° 0.1 mm 6.9
Aug. 17 Partly cloudy
Partly cloudy
 17° /11° 0 mm 5
Aug. 18 Sunny
Sunny
 18° /12° 0 mm 5
Aug. 19 Patchy light rain with thunder
Patchy light rain with thunder
 14° /9° 2.5 mm 4
Aug. 20 Sunny
Sunny
 18° /9° 0 mm 5
Aug. 21 Sunny
Sunny
 21° /10° 0 mm 6
Aug. 22 Sunny
Sunny
 23° /12° 0 mm 6
Aug. 23 Sunny
Sunny
 23° /12° 0 mm 6
Aug. 24 Sunny
Sunny
 23° /12° 2.4 mm 6
Aug. 25 Sunny
Sunny
 22° /13° 0.6 mm 6
Aug. 26 Patchy light rain with thunder
Patchy light rain with thunder
 11° /8° 10.1 mm 3
Aug. 27 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 11° /7° 11.1 mm 3
Aug. 28 Cloudy
Cloudy
 12° /7° 0 mm 3
Aug. 29 Moderate or heavy rain shower
Moderate or heavy rain shower
 11° /5° 8 mm 3
Aug. 30 Partly cloudy
Partly cloudy
 13° /3° 0 mm 4
Aug. 31 Thundery outbreaks possible
Thundery outbreaks possible
 12° /7° 0 mm 3
Next
Important Notice
Our weather forecast for San Juan County in August 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 San Juan County forecast closer to your planned date for the most up-to-date weather information.
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San Juan County in August - FAQ

What are the expected maximum and minimum temperatures in San Juan County during August?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in San Juan County during August?
Significant rainfall exceeding 111.4 mm is expected in San Juan County during August, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in San Juan County during August?
The average wind speed in San Juan County during August is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in San Juan County

Explore the daily rainfall trends and prepare for San Juan Countys August weather 💧
Typically, San Juan County has 8 rainy days in August with a total of 111.4 mm of rainfall.

UV exposure in San Juan County during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
Top locations in San Juan County
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Oljato-Monument ValleySilverton
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Location coordinates Where is San Juan County?

Get accurate weather forecasts for San Juan County, located at latitude 37.812 and longitude -107.665. Stay updated with localized weather information tailored for San Juan County.

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