February is one of the cooler months of the year in Sunnyvale, with average highs near 14.9°C and lows around 4.8°C (mean 9.9°C). It is a relatively wet time of year, averaging 100 mm of rainfall and 83% relative humidity across the period.
February is one of the cooler months of the year in Sunnyvale. Across 45 years of records, the warmest February in Sunnyvale was 1991 — when the month averaged 12.9°C — while the coldest was 2019 at 7.3°C. Typical February days reach 14.9°C with nights near 4.8°C. The long-term February temperature trend is broadly flat.
February is a relatively wet time of year in Sunnyvale, averaging 100 mm of rainfall. The wettest February on record was 1998 with 308 mm, while the driest was 2020 at 0 mm.
Relative humidity in Sunnyvale during February averages 83%. The most humid February was 1998 at 91%, and the least humid was 2018 at 73%.
February receives about 3.3 kWh/m²/day of solar energy in Sunnyvale. The sunniest February was 2022 at 4.2 kWh/m²/day, and the cloudiest was 2000 at 2.6.
Average wind speed in Sunnyvale during February is 1.8 m/s. The windiest February was 2019 at 2.6 m/s, while the calmest was 1995 at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.7°C | 9.9°C | 9.6°C | 10.0°C | 9.9°C | +0.2°C |
| Avg High | 15.1°C | 14.7°C | 14.3°C | 15.2°C | 15.3°C | +0.2°C |
| Avg Low | 4.4°C | 5.1°C | 4.8°C | 4.9°C | 4.5°C | +0.1°C |
| Avg Rain | 96 mm | 119 mm | 104 mm | 96 mm | 76 mm | -20 mm |
February temperatures in Sunnyvale have stayed relatively stable across the record.
February has ranged from a record low of -6.6°C (1989) to a record high of 24.7°C (1991).
Rainfall in February is a relatively wet time of year, averaging 100 mm, with a wettest year of 308 mm.
A quieter season to visit Sunnyvale
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Sunnyvale. That said, February — with days averaging 14.9°C and nights around 4.8°C (mean 9.9°C) and higher rainfall (100 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 | 15.5°C | 10.4°C | 5.4°C | 23.9°C | -0.9°C | 164 mm | 86% | 2 m/s | 3.2 |
| 2024 | 14.7°C | 10.4°C | 6.1°C | 20.7°C | 2.3°C | 155 mm | 88% | 1.8 m/s | 3.1 |
| 2023 | 12.2°C | 7.5°C | 2.8°C | 18.3°C | -1.9°C | 106 mm | 83% | 1.9 m/s | 3.5 |
| 2022 | 16.3°C | 10.1°C | 3.9°C | 23.6°C | -2.5°C | 2 mm | 76% | 1.6 m/s | 4.2 |
| 2021 | 15.9°C | 10.1°C | 4.2°C | 21.2°C | 0.7°C | 28 mm | 79% | 1.9 m/s | 3.9 |
| 2020 | 17.2°C | 11.0°C | 4.7°C | 24.0°C | -3.3°C | 0 mm | 77% | 1.8 m/s | 4.1 |
| 2019 ❄️ | 11.4°C | 7.3°C | 3.3°C | 16.0°C | -2.6°C | 229 mm | 86% | 2.6 m/s | 3 |
| 2018 | 16.2°C | 10.1°C | 4.0°C | 22.9°C | -1.5°C | 11 mm | 73% | 1.8 m/s | 4.1 |
| 2017 | 13.8°C | 10.1°C | 6.5°C | 18.1°C | 1.2°C | 241 mm | 89% | 2.2 m/s | 2.9 |
| 2016 | 17.8°C | 12.0°C | 6.3°C | 23.1°C | 1.9°C | 23 mm | 82% | 1.5 m/s | 3.9 |
| 2015 | 18.1°C | 12.7°C | 7.2°C | 22.4°C | 0.9°C | 76 mm | 84% | 1.7 m/s | 3.5 |
| 2014 | 16.7°C | 11.4°C | 6.1°C | 24.1°C | 1.2°C | 131 mm | 83% | 1.8 m/s | 3.1 |
| 2013 | 14.4°C | 8.7°C | 3.0°C | 20.1°C | -0.2°C | 11 mm | 82% | 1.6 m/s | 4 |
| 2012 | 15.9°C | 10.0°C | 4.0°C | 22.9°C | -1.7°C | 30 mm | 75% | 1.9 m/s | 3.6 |
| 2011 | 13.3°C | 8.0°C | 2.6°C | 20.3°C | -1.7°C | 114 mm | 80% | 1.9 m/s | 3.5 |
| 2010 | 14.1°C | 10.2°C | 6.2°C | 19.2°C | 3.9°C | 98 mm | 90% | 1.5 m/s | 2.8 |
| 2009 | 13.9°C | 9.3°C | 4.7°C | 22.6°C | 0.1°C | 178 mm | 83% | 2 m/s | 3.1 |
| 2008 | 14.0°C | 8.9°C | 3.8°C | 19.5°C | -1.2°C | 74 mm | 86% | 1.8 m/s | 3.4 |
| 2007 | 14.7°C | 9.9°C | 5.1°C | 23.1°C | 0.6°C | 106 mm | 84% | 1.9 m/s | 3 |
| 2006 | 15.1°C | 9.7°C | 4.4°C | 20.5°C | -0.1°C | 50 mm | 82% | 1.7 m/s | 3.5 |
| 2005 | 15.2°C | 10.5°C | 5.9°C | 17.9°C | 1.7°C | 98 mm | 86% | 1.5 m/s | 2.8 |
| 2004 | 13.5°C | 9.2°C | 4.9°C | 17.2°C | -1.0°C | 113 mm | 85% | 1.9 m/s | 3.1 |
| 2003 | 14.4°C | 9.4°C | 4.4°C | 17.6°C | -1.1°C | 46 mm | 80% | 1.6 m/s | 3.4 |
| 2002 | 15.6°C | 10.2°C | 4.7°C | 21.2°C | -0.7°C | 39 mm | 84% | 1.5 m/s | 3.5 |
| 2001 | 13.0°C | 8.3°C | 3.6°C | 21.3°C | -1.6°C | 136 mm | 83% | 2.1 m/s | 3.3 |
| 2000 | 14.0°C | 10.1°C | 6.1°C | 20.9°C | 2.4°C | 197 mm | 89% | 2.1 m/s | 2.6 |
| 1999 | 13.2°C | 8.5°C | 3.8°C | 18.6°C | -2.2°C | 132 mm | 85% | 1.9 m/s | 3 |
| 1998 🌧️ | 12.3°C | 8.8°C | 5.4°C | 15.1°C | 2.7°C | 308 mm | 91% | 2.4 m/s | 2.7 |
| 1997 | 14.3°C | 9.3°C | 4.3°C | 17.4°C | 0.3°C | 9 mm | 85% | 1.9 m/s | 3.7 |
| 1996 | 14.7°C | 10.9°C | 7.0°C | 21.2°C | 0.7°C | 160 mm | 90% | 1.8 m/s | 2.8 |
| 1995 | 16.9°C | 11.7°C | 6.5°C | 23.1°C | 0.4°C | 12 mm | 87% | 1.2 m/s | 3 |
| 1994 | 13.6°C | 8.8°C | 3.9°C | 18.2°C | -2.0°C | 113 mm | 80% | 1.7 m/s | 3.3 |
| 1993 | 13.0°C | 8.8°C | 4.5°C | 18.2°C | -0.8°C | 137 mm | 87% | 2.1 m/s | 2.9 |
| 1992 | 15.9°C | 11.3°C | 6.6°C | 23.1°C | -1.3°C | 175 mm | 84% | 1.9 m/s | 3.2 |
| 1991 🔥 | 19.6°C | 12.9°C | 6.2°C | 24.7°C | 2.3°C | 78 mm | 74% | 1.6 m/s | 3.1 |
| 1990 | 13.6°C | 8.0°C | 2.5°C | 21.2°C | -3.7°C | 68 mm | 79% | 1.9 m/s | 3.5 |
| 1989 | 12.8°C | 7.5°C | 2.1°C | 20.6°C | -6.6°C | 36 mm | 81% | 1.6 m/s | 3.4 |
| 1988 | 17.6°C | 10.8°C | 4.0°C | 22.8°C | -2.5°C | 18 mm | 76% | 1.5 m/s | 3.6 |
| 1987 | 16.1°C | 10.0°C | 3.9°C | 24.6°C | -3.5°C | 111 mm | 75% | 1.9 m/s | 3.6 |
| 1986 | 15.4°C | 11.0°C | 6.6°C | 23.0°C | -4.0°C | 242 mm | 86% | 2.5 m/s | 2.9 |
| 1985 | 15.4°C | 9.3°C | 3.2°C | 20.6°C | -3.9°C | 47 mm | 81% | 1.7 m/s | 3.7 |
| 1984 | 14.1°C | 9.2°C | 4.3°C | 19.3°C | -0.1°C | 52 mm | 84% | 1.6 m/s | 3 |
| 1983 | 14.4°C | 10.3°C | 6.2°C | 19.0°C | 1.4°C | 214 mm | 86% | 2.1 m/s | — |
| 1982 | 14.4°C | 9.3°C | 4.3°C | 19.5°C | -2.2°C | 93 mm | 86% | 1.6 m/s | — |
| 1981 | 15.5°C | 10.1°C | 4.7°C | 22.3°C | 0.3°C | 48 mm | 80% | 1.6 m/s | — |
Actual recorded February data for each year, 1981–2025 — sourced from NASA POWER.
The average high in February is around 14.9°C with lows near 4.8°C (mean 9.9°C), based on 45 years of NASA POWER data.
February averages 100 mm of rainfall in Sunnyvale, a relatively wet time of year. The wettest on record was 308 mm in 1998.
The hottest February reached 24.7°C in 1991. The coldest dipped to -6.6°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average February temperatures have risen by about 0.1°C. Daytime highs moved from 14.8°C to 14.9°C and overnight lows from 4.5°C to 4.5°C over the same span.
February is one of the cooler months of the year in Sunnyvale and a relatively wet time of year, so plan for around 14.9°C daytime highs and 4.8°C at night.
Not quite — February is the 3rd coolest month in Sunnyvale, averaging 9.9°C.
For February in Sunnyvale, pack warm layers and a jacket for chilly mornings, with typical highs of 14.9°C and lows of 4.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in February averages 83% — quite humid.
Average wind speed in February is 1.8 m/s. The windiest February on record averaged 2.6 m/s (2019).
The wettest February on record was 1998 with 308 mm. On average, February sees 100 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 Sunnyvale 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.
