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Charter Oak, CA vs Walnut, CA weather comparison

Charter Oak

CA

Charter Oak and Walnut have remarkably similar climates.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Charter Oak, CA and Walnut, CA
Charter OakMetricWalnut
290 daysSunny daysclear or partly cloudy skies290 days
16 inPrecipitationper year16 in
38 daysWet daysrain or snow per year38 days
0 inSnowfallper year0 in
72 daysHot daysabove 90 °F70 days
3 daysFreezing nightsat or below 32 °F3 days
60%Humidityaverage relative63%
65 °FAverage temperatureyear round66 °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.

Charter OakWalnut

Daily highs

708090JanMarMayJulSepNovCharter Oak, Jan: 68 °FCharter Oak, Feb: 68 °FCharter Oak, Mar: 72 °FCharter Oak, Apr: 76 °FCharter Oak, May: 78 °FCharter Oak, Jun: 84 °FCharter Oak, Jul: 90 °FCharter Oak, Aug: 92 °FCharter Oak, Sep: 89 °FCharter Oak, Oct: 81 °FCharter Oak, Nov: 74 °FCharter Oak, Dec: 67 °FWalnut, Jan: 69 °FWalnut, Feb: 68 °FWalnut, Mar: 72 °FWalnut, Apr: 76 °FWalnut, May: 79 °FWalnut, Jun: 84 °FWalnut, Jul: 90 °FWalnut, Aug: 92 °FWalnut, Sep: 89 °FWalnut, Oct: 82 °FWalnut, Nov: 74 °FWalnut, Dec: 68 °F

Daily lows

5060JanMarMayJulSepNovCharter Oak, Jan: 43 °FCharter Oak, Feb: 45 °FCharter Oak, Mar: 47 °FCharter Oak, Apr: 50 °FCharter Oak, May: 55 °FCharter Oak, Jun: 58 °FCharter Oak, Jul: 63 °FCharter Oak, Aug: 63 °FCharter Oak, Sep: 61 °FCharter Oak, Oct: 54 °FCharter Oak, Nov: 47 °FCharter Oak, Dec: 42 °FWalnut, Jan: 44 °FWalnut, Feb: 45 °FWalnut, Mar: 48 °FWalnut, Apr: 50 °FWalnut, May: 55 °FWalnut, Jun: 58 °FWalnut, Jul: 63 °FWalnut, Aug: 63 °FWalnut, Sep: 61 °FWalnut, Oct: 55 °FWalnut, Nov: 48 °FWalnut, Dec: 42 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Charter Oak high686872767884909289817467
Walnut high696872767984909289827468
Charter Oak low434547505558636361544742
Walnut low444548505558636361554842

Monthly precipitation

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

Charter OakWalnut
0.02.04.0JanMarMayJulSepNovCharter Oak, Jan: 3.6 inCharter Oak, Feb: 4.0 inCharter Oak, Mar: 2.4 inCharter Oak, Apr: 1.0 inCharter Oak, May: 0.4 inCharter Oak, Jun: 0.1 inCharter Oak, Jul: 0.1 inCharter Oak, Aug: 0.0 inCharter Oak, Sep: 0.2 inCharter Oak, Oct: 0.7 inCharter Oak, Nov: 1.0 inCharter Oak, Dec: 2.4 inWalnut, Jan: 3.6 inWalnut, Feb: 4.0 inWalnut, Mar: 2.4 inWalnut, Apr: 1.0 inWalnut, May: 0.4 inWalnut, Jun: 0.1 inWalnut, Jul: 0.1 inWalnut, Aug: 0.0 inWalnut, Sep: 0.2 inWalnut, Oct: 0.7 inWalnut, Nov: 1.0 inWalnut, Dec: 2.4 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Charter Oak3.64.02.41.00.40.10.10.00.20.71.02.4
Walnut3.64.02.41.00.40.10.10.00.20.71.02.4

Monthly sunny days

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

Charter OakWalnut
0102030JanMarMayJulSepNovCharter Oak, Jan: 19 daysCharter Oak, Feb: 17 daysCharter Oak, Mar: 20 daysCharter Oak, Apr: 23 daysCharter Oak, May: 25 daysCharter Oak, Jun: 28 daysCharter Oak, Jul: 29 daysCharter Oak, Aug: 30 daysCharter Oak, Sep: 29 daysCharter Oak, Oct: 27 daysCharter Oak, Nov: 24 daysCharter Oak, Dec: 21 daysWalnut, Jan: 19 daysWalnut, Feb: 17 daysWalnut, Mar: 20 daysWalnut, Apr: 23 daysWalnut, May: 25 daysWalnut, Jun: 28 daysWalnut, Jul: 29 daysWalnut, Aug: 30 daysWalnut, Sep: 29 daysWalnut, Oct: 27 daysWalnut, Nov: 24 daysWalnut, Dec: 21 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Charter Oak191720232528293029272421
Walnut191720232528293029272421

Keep comparing

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

Charter Oak vs another city

See the full Charter Oak, CA climate profile

More California cities

Walnut vs another city

See the full Walnut, 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).