Modoc County Weather in August
Average highs run from 90°F on August 1 to 85°F on August 31, and lows from 47°F to 41°F. Normal precipitation for the month is 0.27 in over about 2 wet days.
August day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
August at a glance
- Average high
- 87°F
- Average low
- 44°F
- Precipitation
- 0.27 in
- Record high
- 102°FAug 9, 2018
- Record low
- 28°FAug 31, 1999
- Chance of a freeze
- 16%
- Days of 90°F or more
- 13.5
- Daylight
- 14 h 22 min to 13 h 09 min
- Cloud cover
- 25%
- Humidity
- 37%
- Dew point
- 37°F
- Wind
- 6.7 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Aug 1 | 90°F | 47°F | 100°F 2017 | 40°F 2001 | 7% |
| Aug 2 | 90°F | 47°F | 100°F 2017 | 36°F 2013 | 7% |
| Aug 3 | 90°F | 47°F | 100°F 2017 | 38°F 2011 | 7% |
| Aug 4 | 90°F | 47°F | 98°F 2012 | 39°F 2008 | 7% |
| Aug 5 | 89°F | 47°F | 99°F 2005 | 32°F 2002 | 7% |
| Aug 6 | 89°F | 46°F | 99°F 2026 | 32°F 2002 | 7% |
| Aug 7 | 89°F | 46°F | 101°F 2026 | 36°F 2002 | 7% |
| Aug 8 | 89°F | 46°F | 100°F 2018 | 30°F 2002 | 7% |
| Aug 9 | 89°F | 46°F | 102°F 2018 | 37°F 2008 | 7% |
| Aug 10 | 88°F | 46°F | 97°F 2026 | 38°F 2008 | 7% |
| Aug 11 | 88°F | 45°F | 99°F 2021 | 36°F 2019 | 7% |
| Aug 12 | 88°F | 45°F | 100°F 2021 | 33°F 2007 | 7% |
| Aug 13 | 88°F | 45°F | 98°F 2002 | 31°F 2007 | 7% |
| Aug 14 | 88°F | 45°F | 100°F 2008 | 35°F 2007 | 7% |
| Aug 15 | 88°F | 45°F | 101°F 2008 | 37°F 1999 | 7% |
| Aug 16 | 87°F | 44°F | 100°F 2008 | 34°F 2009 | 7% |
| Aug 17 | 87°F | 44°F | 98°F 2008 | 33°F 2007 | 7% |
| Aug 18 | 87°F | 44°F | 97°F 2003 | 33°F 2007 | 7% |
| Aug 19 | 87°F | 44°F | 98°F 2009 | 36°F 2025 | 7% |
| Aug 20 | 87°F | 43°F | 99°F 2009 | 36°F 2024 | 7% |
| Aug 21 | 86°F | 43°F | 95°F 2009 | 35°F 2002 | 7% |
| Aug 22 | 86°F | 43°F | 99°F 2025 | 32°F 2002 | 7% |
| Aug 23 | 86°F | 43°F | 98°F 2025 | 34°F 2006 | 7% |
| Aug 24 | 86°F | 42°F | 95°F 2007 | 35°F 2021 | 7% |
| Aug 25 | 86°F | 42°F | 98°F 2010 | 34°F 2009 | 7% |
| Aug 26 | 86°F | 42°F | 96°F 2017 | 34°F 2000 | 7% |
| Aug 27 | 85°F | 42°F | 99°F 2017 | 33°F 2012 | 7% |
| Aug 28 | 85°F | 42°F | 97°F 2017 | 30°F 2012 | 7% |
| Aug 29 | 85°F | 41°F | 97°F 2017 | 34°F 2012 | 7% |
| Aug 30 | 85°F | 41°F | 96°F 2022 | 33°F 2005 | 8% |
| Aug 31 | 85°F | 41°F | 96°F 2024 | 28°F 1999 | 8% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- August 1
- sunrise 5:58 AM, sunset 8:20 PM
- August 31
- sunrise 6:28 AM, sunset 7:37 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00094299 (Alturas Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00094299, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.