August is one of the warmer months of the year in Fairbanks, with average highs near 15.6°C and lows around 7.5°C (mean 11.6°C). It is a relatively wet time of year, averaging 91 mm of rainfall and 81% relative humidity across the period.
August is one of the warmer months of the year in Fairbanks. Across 45 years of records, the warmest August in Fairbanks was 2004 — when the month averaged 14.8°C — while the coldest was 2000 at 8.5°C. Typical August days reach 15.6°C with nights near 7.5°C. The long-term trend is warming, about 0.3°C per decade.
August is a relatively wet time of year in Fairbanks, averaging 91 mm of rainfall. The wettest August on record was 2025 with 165 mm, while the driest was 2004 at 17 mm.
Relative humidity in Fairbanks during August averages 81%. The most humid August was 2024 at 88%, and the least humid was 2013 at 71%.
August receives about 3.5 kWh/m²/day of solar energy in Fairbanks. The sunniest Augusts were 2004 and 2007 at 4.1 kWh/m²/day, and the cloudiest was 2018 at 2.8.
Average wind speed in Fairbanks during August is 1.3 m/s. The windiest August was 1991 at 1.7 m/s, while the calmest was 1999 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.1°C | 11.4°C | 11.4°C | 11.9°C | 12.0°C | +0.9°C |
| Avg High | 15.3°C | 15.5°C | 15.6°C | 16.1°C | 15.8°C | +0.5°C |
| Avg Low | 6.8°C | 7.3°C | 7.3°C | 7.8°C | 8.3°C | +1.5°C |
| Avg Rain | 73 mm | 92 mm | 86 mm | 88 mm | 127 mm | +54 mm |
August temperatures in Fairbanks have risen by about 1.4°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -3.5°C (1987) to a record high of 28.2°C (1994).
Rainfall in August is a relatively wet time of year, averaging 91 mm, with a wettest year of 165 mm.
One of the best times to visit Fairbanks
August is one of the best times to visit Fairbanks. Expect days averaging 15.6°C and nights around 7.5°C (mean 11.6°C) — warmer than Fairbanks's yearly average — with higher rainfall (91 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🌧️ | 15.3°C | 11.5°C | 7.7°C | 21.8°C | 2.5°C | 165 mm | 87% | 1.3 m/s | 3.1 |
| 2024 | 14.3°C | 10.5°C | 6.8°C | 24.7°C | 1.8°C | 135 mm | 88% | 1.5 m/s | 3.1 |
| 2023 | 17.5°C | 14.0°C | 10.5°C | 24.7°C | 5.6°C | 125 mm | 86% | 1.3 m/s | 3.1 |
| 2022 | 16.6°C | 12.5°C | 8.5°C | 21.8°C | 3.3°C | 75 mm | 83% | 1.2 m/s | 3.7 |
| 2021 | 14.1°C | 10.8°C | 7.4°C | 25.1°C | 0.1°C | 160 mm | 87% | 1.2 m/s | 3.2 |
| 2020 | 17.0°C | 13.0°C | 9.0°C | 23.4°C | 5.9°C | 101 mm | 84% | 1.1 m/s | 3.9 |
| 2019 | 14.8°C | 11.0°C | 7.2°C | 18.3°C | 2.4°C | 121 mm | 83% | 1.4 m/s | 3.4 |
| 2018 | 14.5°C | 10.9°C | 7.3°C | 19.4°C | 1.5°C | 147 mm | 85% | 1.3 m/s | 2.8 |
| 2017 | 16.2°C | 12.5°C | 8.8°C | 25.0°C | 4.6°C | 84 mm | 83% | 1.2 m/s | 3.2 |
| 2016 | 17.3°C | 13.3°C | 9.3°C | 22.1°C | 4.2°C | 80 mm | 83% | 1.3 m/s | 3.6 |
| 2015 | 13.9°C | 10.0°C | 6.2°C | 23.3°C | -1.6°C | 106 mm | 82% | 1.2 m/s | 3.1 |
| 2014 | 16.4°C | 12.3°C | 8.2°C | 21.8°C | -0.8°C | 90 mm | 81% | 1.2 m/s | 3.8 |
| 2013 | 18.3°C | 13.4°C | 8.5°C | 25.8°C | -0.3°C | 65 mm | 71% | 1.1 m/s | 4 |
| 2012 | 16.4°C | 12.0°C | 7.7°C | 22.9°C | 2.1°C | 60 mm | 76% | 1.2 m/s | 3.5 |
| 2011 | 15.4°C | 11.0°C | 6.6°C | 20.8°C | 2.8°C | 78 mm | 79% | 1.2 m/s | 3.7 |
| 2010 | 17.3°C | 12.8°C | 8.4°C | 26.5°C | 3.6°C | 45 mm | 79% | 1.2 m/s | 3.8 |
| 2009 | 14.7°C | 10.5°C | 6.3°C | 25.0°C | 1.4°C | 122 mm | 81% | 1.1 m/s | 3.2 |
| 2008 | 14.1°C | 9.6°C | 5.1°C | 18.3°C | 3.0°C | 54 mm | 81% | 1.4 m/s | 3.8 |
| 2007 | 18.4°C | 14.1°C | 9.9°C | 24.2°C | 6.6°C | 70 mm | 78% | 1.1 m/s | 4.1 |
| 2006 | 14.3°C | 10.4°C | 6.6°C | 18.9°C | 2.2°C | 106 mm | 84% | 1.3 m/s | 3.4 |
| 2005 | 16.9°C | 12.4°C | 8.0°C | 26.2°C | 1.1°C | 30 mm | 81% | 1.1 m/s | 3.4 |
| 2004 🔥 | 19.4°C | 14.8°C | 10.2°C | 24.5°C | 3.8°C | 17 mm | 81% | 1.3 m/s | 4.1 |
| 2003 | 15.5°C | 11.4°C | 7.3°C | 22.2°C | 4.3°C | 109 mm | 83% | 1.3 m/s | 3.7 |
| 2002 | 14.4°C | 10.5°C | 6.6°C | 25.2°C | 1.7°C | 145 mm | 81% | 1.2 m/s | 3.4 |
| 2001 | 15.9°C | 11.9°C | 7.9°C | 20.3°C | 4.3°C | 90 mm | 84% | 1.5 m/s | 3.2 |
| 2000 ❄️ | 12.3°C | 8.5°C | 4.6°C | 21.7°C | -0.1°C | 119 mm | 84% | 1.4 m/s | 3.3 |
| 1999 | 16.8°C | 12.5°C | 8.2°C | 24.8°C | 0.9°C | 82 mm | 79% | 1 m/s | 3.7 |
| 1998 | 13.5°C | 9.7°C | 5.8°C | 22.2°C | -0.3°C | 137 mm | 84% | 1.5 m/s | 3.2 |
| 1997 | 16.1°C | 12.3°C | 8.4°C | 21.3°C | 0.6°C | 122 mm | 84% | 1.2 m/s | 3.6 |
| 1996 | 13.4°C | 9.2°C | 5.0°C | 17.8°C | -2.5°C | 74 mm | 79% | 1.5 m/s | 3.8 |
| 1995 | 15.5°C | 11.5°C | 7.5°C | 20.8°C | 3.9°C | 109 mm | 82% | 1.2 m/s | 3.5 |
| 1994 | 17.6°C | 13.3°C | 9.0°C | 28.2°C | -0.7°C | 61 mm | 81% | 1.3 m/s | 3.6 |
| 1993 | 15.2°C | 11.3°C | 7.4°C | 21.1°C | 2.4°C | 91 mm | 79% | 1.4 m/s | 3.5 |
| 1992 | 15.8°C | 11.4°C | 7.1°C | 23.1°C | 1.9°C | 44 mm | 80% | 1.3 m/s | 3.7 |
| 1991 | 13.9°C | 9.8°C | 5.7°C | 19.9°C | -2.0°C | 103 mm | 81% | 1.7 m/s | 3.7 |
| 1990 | 17.0°C | 13.0°C | 9.1°C | 25.6°C | 3.2°C | 102 mm | 82% | 1.3 m/s | 3.7 |
| 1989 | 17.9°C | 13.5°C | 9.0°C | 22.3°C | 4.8°C | 45 mm | 80% | 1.1 m/s | 3.6 |
| 1988 | 16.0°C | 11.9°C | 7.9°C | 23.1°C | 3.3°C | 68 mm | 81% | 1.3 m/s | 3.2 |
| 1987 | 16.3°C | 11.8°C | 7.4°C | 21.2°C | -3.5°C | 52 mm | 79% | 1.3 m/s | 3.7 |
| 1986 | 13.9°C | 9.8°C | 5.7°C | 20.9°C | -2.6°C | 102 mm | 80% | 1.2 m/s | 3.7 |
| 1985 | 14.8°C | 10.8°C | 6.8°C | 21.8°C | 3.2°C | 64 mm | 81% | 1.3 m/s | 3.6 |
| 1984 | 13.5°C | 9.5°C | 5.5°C | 19.9°C | -3.0°C | 69 mm | 81% | 1.4 m/s | 3.4 |
| 1983 | 14.0°C | 10.1°C | 6.3°C | 19.3°C | 1.6°C | 126 mm | 82% | 1.2 m/s | — |
| 1982 | 15.7°C | 11.4°C | 7.1°C | 20.9°C | 3.2°C | 51 mm | 79% | 1.1 m/s | — |
| 1981 | 15.4°C | 10.7°C | 5.9°C | 22.7°C | 0.5°C | 83 mm | 77% | 1.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 15.6°C with lows near 7.5°C (mean 11.6°C), based on 45 years of NASA POWER data.
August averages 91 mm of rainfall in Fairbanks, a relatively wet time of year. The wettest on record was 165 mm in 2025.
The hottest August reached 28.2°C in 1994. The coldest dipped to -3.5°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.4°C. Daytime highs moved from 14.7°C to 15.6°C and overnight lows from 6.3°C to 8.2°C over the same span.
August is one of the warmer months of the year in Fairbanks and a relatively wet time of year, so plan for around 15.6°C daytime highs and 7.5°C at night.
Not quite — August is the 10th coolest month in Fairbanks, averaging 11.6°C.
For August in Fairbanks, pack warm layers and a jacket for chilly mornings, with typical highs of 15.6°C and lows of 7.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 81% — quite humid.
Average wind speed in August is 1.3 m/s. The windiest August on record averaged 1.7 m/s (1991).
The wettest August on record was 2025 with 165 mm. On average, August sees 91 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Fairbanks behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
