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Palo Alto, CA vs Sunnyvale, CA weather comparison

Palo Alto

CA

Sunnyvale enjoys about 17 more sunny days a year than Palo Alto.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Palo Alto, CA and Sunnyvale, CA
Palo AltoMetricSunnyvale
234 daysSunny daysclear or partly cloudy skies251 days
21 inPrecipitationper year15 in
56 daysWet daysrain or snow per year61 days
0 inSnowfallper year0 in
17 daysHot daysabove 90 °F11 days
12 daysFreezing nightsat or below 32 °F2 days
74%Humidityaverage relative72%
59 °FAverage temperatureyear round60 °F

Monthly temperatures

Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.

Palo AltoSunnyvale

Daily highs

607080JanMarMayJulSepNovPalo Alto, Jan: 59 °FPalo Alto, Feb: 62 °FPalo Alto, Mar: 66 °FPalo Alto, Apr: 70 °FPalo Alto, May: 74 °FPalo Alto, Jun: 79 °FPalo Alto, Jul: 80 °FPalo Alto, Aug: 80 °FPalo Alto, Sep: 80 °FPalo Alto, Oct: 75 °FPalo Alto, Nov: 65 °FPalo Alto, Dec: 58 °FSunnyvale, Jan: 59 °FSunnyvale, Feb: 62 °FSunnyvale, Mar: 65 °FSunnyvale, Apr: 68 °FSunnyvale, May: 72 °FSunnyvale, Jun: 76 °FSunnyvale, Jul: 78 °FSunnyvale, Aug: 78 °FSunnyvale, Sep: 78 °FSunnyvale, Oct: 74 °FSunnyvale, Nov: 65 °FSunnyvale, Dec: 59 °F

Daily lows

405060JanMarMayJulSepNovPalo Alto, Jan: 40 °FPalo Alto, Feb: 42 °FPalo Alto, Mar: 44 °FPalo Alto, Apr: 46 °FPalo Alto, May: 50 °FPalo Alto, Jun: 53 °FPalo Alto, Jul: 56 °FPalo Alto, Aug: 56 °FPalo Alto, Sep: 54 °FPalo Alto, Oct: 49 °FPalo Alto, Nov: 43 °FPalo Alto, Dec: 39 °FSunnyvale, Jan: 42 °FSunnyvale, Feb: 44 °FSunnyvale, Mar: 47 °FSunnyvale, Apr: 49 °FSunnyvale, May: 53 °FSunnyvale, Jun: 56 °FSunnyvale, Jul: 58 °FSunnyvale, Aug: 59 °FSunnyvale, Sep: 57 °FSunnyvale, Oct: 53 °FSunnyvale, Nov: 46 °FSunnyvale, Dec: 42 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Palo Alto high596266707479808080756558
Sunnyvale high596265687276787878746559
Palo Alto low404244465053565654494339
Sunnyvale low424447495356585957534642

Monthly precipitation

Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.

Palo AltoSunnyvale
0.02.04.0JanMarMayJulSepNovPalo Alto, Jan: 3.9 inPalo Alto, Feb: 4.2 inPalo Alto, Mar: 3.2 inPalo Alto, Apr: 1.6 inPalo Alto, May: 0.8 inPalo Alto, Jun: 0.2 inPalo Alto, Jul: 0.0 inPalo Alto, Aug: 0.0 inPalo Alto, Sep: 0.1 inPalo Alto, Oct: 0.9 inPalo Alto, Nov: 2.0 inPalo Alto, Dec: 3.7 inSunnyvale, Jan: 2.8 inSunnyvale, Feb: 2.9 inSunnyvale, Mar: 2.3 inSunnyvale, Apr: 1.2 inSunnyvale, May: 0.6 inSunnyvale, Jun: 0.1 inSunnyvale, Jul: 0.0 inSunnyvale, Aug: 0.0 inSunnyvale, Sep: 0.1 inSunnyvale, Oct: 0.7 inSunnyvale, Nov: 1.3 inSunnyvale, Dec: 2.5 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Palo Alto3.94.23.21.60.80.20.00.00.10.92.03.7
Sunnyvale2.82.92.31.20.60.10.00.00.10.71.32.5

Monthly sunny days

Days each month with clear or partly cloudy skies, so compare the same month between cities.

Palo AltoSunnyvale
0102030JanMarMayJulSepNovPalo Alto, Jan: 13 daysPalo Alto, Feb: 13 daysPalo Alto, Mar: 15 daysPalo Alto, Apr: 18 daysPalo Alto, May: 20 daysPalo Alto, Jun: 23 daysPalo Alto, Jul: 26 daysPalo Alto, Aug: 25 daysPalo Alto, Sep: 26 daysPalo Alto, Oct: 23 daysPalo Alto, Nov: 18 daysPalo Alto, Dec: 15 daysSunnyvale, Jan: 14 daysSunnyvale, Feb: 13 daysSunnyvale, Mar: 15 daysSunnyvale, Apr: 18 daysSunnyvale, May: 22 daysSunnyvale, Jun: 25 daysSunnyvale, Jul: 29 daysSunnyvale, Aug: 29 daysSunnyvale, Sep: 28 daysSunnyvale, Oct: 24 daysSunnyvale, Nov: 18 daysSunnyvale, Dec: 15 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Palo Alto131315182023262526231815
Sunnyvale141315182225292928241815

Keep comparing

Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.

Palo Alto vs another city

See the full Palo Alto, CA climate profile

More California cities

Sunnyvale vs another city

See the full Sunnyvale, CA climate profile

More California cities

About this data

Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).