February is one of the cooler months of the year in Boise, with average highs near 5.6°C and lows around -3.3°C (mean 1.2°C). It is about average for rainfall, averaging 42 mm of rainfall and 74% relative humidity across the period.
February is one of the cooler months of the year in Boise. Across 45 years of records, the warmest February in Boise was 1992 — when the month averaged 5°C — while the coldest was 1989 at -4.1°C. Typical February days reach 5.6°C with nights near -3.3°C. The long-term February temperature trend is broadly flat.
February is about average for rainfall in Boise, averaging 42 mm of rainfall. The wettest February on record was 1986 with 146 mm, while the driest was 2022 at 5 mm.
Relative humidity in Boise during February averages 74%. The most humid February was 1993 at 83%, and the least humid was 2005 at 65%.
February receives about 2.7 kWh/m²/day of solar energy in Boise. The sunniest February was 2005 at 3.2 kWh/m²/day, and the cloudiest was 2019 at 2.
Average wind speed in Boise during February is 2.3 m/s. The windiest February was 1999 at 3 m/s, while the calmest was 2005 at 1.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 0.4°C | 1.5°C | 1.5°C | 1.4°C | 0.8°C | +0.4°C |
| Avg High | 5.0°C | 6.1°C | 5.9°C | 5.6°C | 5.2°C | +0.2°C |
| Avg Low | -4.3°C | -3.1°C | -3.0°C | -2.8°C | -3.5°C | +0.8°C |
| Avg Rain | 49 mm | 38 mm | 28 mm | 46 mm | 55 mm | +6 mm |
February temperatures in Boise have risen by about 0.7°C between 1981–1985 and 2021–2025.
February has ranged from a record low of -22.9°C (1989) to a record high of 18.5°C (1995).
Rainfall in February is about average for rainfall, averaging 42 mm, with a wettest year of 146 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A quieter season to visit Boise
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Boise. That said, February — with days averaging 5.6°C and nights around -3.3°C (mean 1.2°C) and moderate rainfall (42 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 3.8°C | -0.3°C | -4.5°C | 12.2°C | -16.4°C | 125 mm | 82% | 2.2 m/s | 2.7 |
| 2024 | 7.3°C | 3.1°C | -1.1°C | 14.4°C | -5.5°C | 77 mm | 76% | 2.5 m/s | 2.5 |
| 2023 | 4.7°C | 0.3°C | -4.1°C | 9.5°C | -9.5°C | 31 mm | 72% | 2.7 m/s | 2.8 |
| 2022 | 4.7°C | 0.1°C | -4.5°C | 15.2°C | -11.3°C | 5 mm | 73% | 2.1 m/s | 3.1 |
| 2021 | 4.4°C | 0.3°C | -3.8°C | 10.4°C | -7.6°C | 59 mm | 77% | 2.4 m/s | 2.5 |
| 2020 | 6.0°C | 1.4°C | -3.1°C | 14.9°C | -7.6°C | 31 mm | 68% | 2.5 m/s | 3.1 |
| 2019 | 2.5°C | -1.1°C | -4.6°C | 10.6°C | -11.6°C | 99 mm | 80% | 2.6 m/s | 2 |
| 2018 | 4.5°C | -0.1°C | -4.6°C | 14.4°C | -13.0°C | 34 mm | 74% | 2.4 m/s | 2.5 |
| 2017 | 3.0°C | 0.1°C | -2.8°C | 9.4°C | -8.5°C | 101 mm | 82% | 2.4 m/s | 2.1 |
| 2016 | 8.3°C | 3.5°C | -1.3°C | 14.6°C | -9.3°C | 24 mm | 75% | 2.1 m/s | 3 |
| 2015 | 9.5°C | 4.9°C | 0.3°C | 15.7°C | -5.1°C | 42 mm | 71% | 2 m/s | 2.9 |
| 2014 | 5.9°C | 1.8°C | -2.3°C | 13.9°C | -12.3°C | 74 mm | 77% | 2.2 m/s | 2.4 |
| 2013 | 5.6°C | 1.1°C | -3.3°C | 12.8°C | -7.4°C | 19 mm | 73% | 2.3 m/s | 2.9 |
| 2012 | 6.1°C | 1.7°C | -2.7°C | 11.2°C | -5.0°C | 22 mm | 72% | 2.4 m/s | 2.8 |
| 2011 | 4.3°C | 0.0°C | -4.3°C | 14.2°C | -12.7°C | 14 mm | 70% | 2.3 m/s | 2.6 |
| 2010 | 6.1°C | 1.9°C | -2.3°C | 10.1°C | -5.3°C | 29 mm | 77% | 1.8 m/s | 2.4 |
| 2009 | 6.1°C | 1.7°C | -2.7°C | 12.8°C | -8.7°C | 15 mm | 69% | 2.4 m/s | 2.7 |
| 2008 | 5.2°C | 0.8°C | -3.7°C | 13.6°C | -11.2°C | 27 mm | 78% | 2.1 m/s | 3.1 |
| 2007 | 7.2°C | 2.8°C | -1.7°C | 12.7°C | -10.6°C | 43 mm | 74% | 2.2 m/s | 2.5 |
| 2006 | 4.4°C | 0.0°C | -4.4°C | 13.5°C | -11.9°C | 23 mm | 73% | 2.1 m/s | 3.1 |
| 2005 | 7.5°C | 2.5°C | -2.4°C | 13.1°C | -6.9°C | 10 mm | 65% | 1.5 m/s | 3.2 |
| 2004 | 4.9°C | 0.5°C | -3.9°C | 11.1°C | -10.6°C | 42 mm | 80% | 2.7 m/s | 2.3 |
| 2003 | 5.3°C | 1.2°C | -2.9°C | 12.1°C | -6.9°C | 25 mm | 70% | 2.2 m/s | 3 |
| 2002 | 5.1°C | 0.3°C | -4.4°C | 14.8°C | -8.7°C | 16 mm | 70% | 2.9 m/s | 3.1 |
| 2001 | 5.1°C | 0.8°C | -3.6°C | 9.6°C | -9.7°C | 15 mm | 71% | 2 m/s | 2.5 |
| 2000 | 8.5°C | 3.9°C | -0.7°C | 15.3°C | -4.8°C | 67 mm | 75% | 2.5 m/s | 2.4 |
| 1999 | 4.9°C | 0.6°C | -3.6°C | 14.1°C | -9.2°C | 77 mm | 77% | 3 m/s | 2.2 |
| 1998 | 5.8°C | 1.8°C | -2.2°C | 10.6°C | -5.9°C | 48 mm | 75% | 2.9 m/s | 2.4 |
| 1997 | 4.8°C | 0.6°C | -3.7°C | 11.0°C | -8.5°C | 10 mm | 76% | 2 m/s | 2.9 |
| 1996 | 4.4°C | 0.1°C | -4.3°C | 13.1°C | -21.3°C | 47 mm | 77% | 2.3 m/s | 2.6 |
| 1995 | 9.6°C | 4.5°C | -0.5°C | 18.5°C | -9.5°C | 27 mm | 72% | 1.9 m/s | 2.9 |
| 1994 | 4.6°C | 0.2°C | -4.2°C | 12.5°C | -9.5°C | 46 mm | 71% | 2.2 m/s | 2.5 |
| 1993 | 2.2°C | -1.7°C | -5.5°C | 9.7°C | -10.9°C | 37 mm | 83% | 2.4 m/s | 2.7 |
| 1992 🔥 | 10.2°C | 5.0°C | -0.2°C | 17.7°C | -2.8°C | 37 mm | 71% | 2 m/s | 2.8 |
| 1991 | 10.3°C | 4.6°C | -1.1°C | 14.3°C | -4.0°C | 17 mm | 66% | 2 m/s | 2.9 |
| 1990 | 4.0°C | -0.8°C | -5.6°C | 12.4°C | -14.4°C | 35 mm | 72% | 2.2 m/s | 2.8 |
| 1989 ❄️ | 0.8°C | -4.1°C | -9.0°C | 14.4°C | -22.9°C | 32 mm | 83% | 2.1 m/s | 2.9 |
| 1988 | 7.6°C | 2.2°C | -3.1°C | 16.0°C | -10.8°C | 15 mm | 68% | 1.9 m/s | 3.1 |
| 1987 | 7.4°C | 2.7°C | -2.1°C | 13.7°C | -6.1°C | 36 mm | 69% | 1.9 m/s | 2.7 |
| 1986 🌧️ | 7.0°C | 2.7°C | -1.5°C | 18.1°C | -8.8°C | 146 mm | 80% | 2.2 m/s | 2.3 |
| 1985 | 2.3°C | -2.2°C | -6.7°C | 10.5°C | -19.4°C | 29 mm | 77% | 2.1 m/s | 2.7 |
| 1984 | 3.3°C | -0.7°C | -4.6°C | 7.6°C | -8.3°C | 34 mm | 82% | 2.6 m/s | 2.5 |
| 1983 | 7.1°C | 2.7°C | -1.8°C | 13.4°C | -10.3°C | 48 mm | 77% | 2.9 m/s | — |
| 1982 | 2.9°C | -1.9°C | -6.7°C | 12.7°C | -20.9°C | 64 mm | 82% | 2.4 m/s | — |
| 1981 | 7.0°C | 2.1°C | -2.9°C | 16.1°C | -11.8°C | 36 mm | 70% | 2 m/s | — |
Actual recorded February data for each year, 1981–2025 — sourced from NASA POWER.
The average high in February is around 5.6°C with lows near -3.3°C (mean 1.2°C), based on 45 years of NASA POWER data.
February averages 42 mm of rainfall in Boise, about average for rainfall. The wettest on record was 146 mm in 1986.
The hottest February reached 18.5°C in 1995. The coldest dipped to -22.9°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average February temperatures have risen by about 0.7°C. Daytime highs moved from 4.5°C to 5°C and overnight lows from -4.5°C to -3.6°C over the same span.
February is one of the cooler months of the year in Boise and about average for rainfall, so plan for around 5.6°C daytime highs and -3.3°C at night.
Not quite — February is the 3rd coolest month in Boise, averaging 1.2°C.
For February in Boise, pack warm layers and a jacket for chilly mornings, with typical highs of 5.6°C and lows of -3.3°C.
Relative humidity in February averages 74% — moderately humid.
Average wind speed in February is 2.3 m/s. The windiest February on record averaged 3 m/s (1999).
The wettest February on record was 1986 with 146 mm. On average, February sees 42 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 Boise behaves each February, 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 February specifically, along with year-by-year records and how the month has changed over the decades.
