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Altadena, CA vs Sierra Madre, CA weather comparison

Altadena

CA

Sierra Madre picks up around 14 more inches of snow each winter.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Altadena, CA and Sierra Madre, CA
AltadenaMetricSierra Madre
294 daysSunny daysclear or partly cloudy skies294 days
15 inPrecipitationper year16 in
37 daysWet daysrain or snow per year44 days
0 inSnowfallper year14 in
71 daysHot daysabove 90 °F69 days
0 daysFreezing nightsat or below 32 °F0 days
56%Humidityaverage relative56%
66 °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.

AltadenaSierra Madre

Daily highs

708090JanMarMayJulSepNovAltadena, Jan: 68 °FAltadena, Feb: 69 °FAltadena, Mar: 72 °FAltadena, Apr: 76 °FAltadena, May: 78 °FAltadena, Jun: 83 °FAltadena, Jul: 88 °FAltadena, Aug: 91 °FAltadena, Sep: 89 °FAltadena, Oct: 83 °FAltadena, Nov: 75 °FAltadena, Dec: 67 °FSierra Madre, Jan: 68 °FSierra Madre, Feb: 69 °FSierra Madre, Mar: 72 °FSierra Madre, Apr: 75 °FSierra Madre, May: 77 °FSierra Madre, Jun: 82 °FSierra Madre, Jul: 88 °FSierra Madre, Aug: 90 °FSierra Madre, Sep: 89 °FSierra Madre, Oct: 82 °FSierra Madre, Nov: 74 °FSierra Madre, Dec: 67 °F

Daily lows

5060JanMarMayJulSepNovAltadena, Jan: 45 °FAltadena, Feb: 46 °FAltadena, Mar: 49 °FAltadena, Apr: 51 °FAltadena, May: 55 °FAltadena, Jun: 58 °FAltadena, Jul: 62 °FAltadena, Aug: 64 °FAltadena, Sep: 62 °FAltadena, Oct: 56 °FAltadena, Nov: 49 °FAltadena, Dec: 45 °FSierra Madre, Jan: 46 °FSierra Madre, Feb: 46 °FSierra Madre, Mar: 49 °FSierra Madre, Apr: 51 °FSierra Madre, May: 55 °FSierra Madre, Jun: 59 °FSierra Madre, Jul: 63 °FSierra Madre, Aug: 64 °FSierra Madre, Sep: 62 °FSierra Madre, Oct: 56 °FSierra Madre, Nov: 50 °FSierra Madre, Dec: 45 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Altadena high686972767883889189837567
Sierra Madre high686972757782889089827467
Altadena low454649515558626462564945
Sierra Madre low464649515559636462565045

Monthly precipitation

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

AltadenaSierra Madre
0.02.04.0JanMarMayJulSepNovAltadena, Jan: 3.4 inAltadena, Feb: 3.7 inAltadena, Mar: 2.5 inAltadena, Apr: 1.0 inAltadena, May: 0.5 inAltadena, Jun: 0.1 inAltadena, Jul: 0.1 inAltadena, Aug: 0.0 inAltadena, Sep: 0.2 inAltadena, Oct: 0.7 inAltadena, Nov: 0.9 inAltadena, Dec: 2.3 inSierra Madre, Jan: 3.5 inSierra Madre, Feb: 3.8 inSierra Madre, Mar: 2.5 inSierra Madre, Apr: 1.0 inSierra Madre, May: 0.5 inSierra Madre, Jun: 0.1 inSierra Madre, Jul: 0.4 inSierra Madre, Aug: 0.2 inSierra Madre, Sep: 0.3 inSierra Madre, Oct: 0.8 inSierra Madre, Nov: 0.9 inSierra Madre, Dec: 2.3 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Altadena3.43.72.51.00.50.10.10.00.20.70.92.3
Sierra Madre3.53.82.51.00.50.10.40.20.30.80.92.3

Monthly sunny days

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

AltadenaSierra Madre
0102030JanMarMayJulSepNovAltadena, Jan: 20 daysAltadena, Feb: 17 daysAltadena, Mar: 21 daysAltadena, Apr: 23 daysAltadena, May: 25 daysAltadena, Jun: 28 daysAltadena, Jul: 29 daysAltadena, Aug: 30 daysAltadena, Sep: 29 daysAltadena, Oct: 27 daysAltadena, Nov: 24 daysAltadena, Dec: 22 daysSierra Madre, Jan: 20 daysSierra Madre, Feb: 17 daysSierra Madre, Mar: 20 daysSierra Madre, Apr: 23 daysSierra Madre, May: 25 daysSierra Madre, Jun: 28 daysSierra Madre, Jul: 29 daysSierra Madre, Aug: 30 daysSierra Madre, Sep: 29 daysSierra Madre, Oct: 28 daysSierra Madre, Nov: 24 daysSierra Madre, Dec: 22 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Altadena201721232528293029272422
Sierra Madre201720232528293029282422

Keep comparing

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

Altadena vs another city

See the full Altadena, CA climate profile

More California cities

Sierra Madre vs another city

See the full Sierra Madre, 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).