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Altadena, CA vs East Pasadena, CA weather comparison

Altadena

CA

Altadena and East Pasadena have remarkably similar climates.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Altadena, CA and East Pasadena, CA
AltadenaMetricEast Pasadena
294 daysSunny daysclear or partly cloudy skies291 days
15 inPrecipitationper year14 in
37 daysWet daysrain or snow per year34 days
0 inSnowfallper year0 in
71 daysHot daysabove 90 °F68 days
0 daysFreezing nightsat or below 32 °F0 days
56%Humidityaverage relative59%
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.

AltadenaEast Pasadena

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 °FEast Pasadena, Jan: 68 °FEast Pasadena, Feb: 69 °FEast Pasadena, Mar: 72 °FEast Pasadena, Apr: 75 °FEast Pasadena, May: 77 °FEast Pasadena, Jun: 82 °FEast Pasadena, Jul: 87 °FEast Pasadena, Aug: 89 °FEast Pasadena, Sep: 88 °FEast Pasadena, Oct: 82 °FEast Pasadena, Nov: 74 °FEast Pasadena, 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 °FEast Pasadena, Jan: 46 °FEast Pasadena, Feb: 47 °FEast Pasadena, Mar: 50 °FEast Pasadena, Apr: 52 °FEast Pasadena, May: 56 °FEast Pasadena, Jun: 60 °FEast Pasadena, Jul: 64 °FEast Pasadena, Aug: 64 °FEast Pasadena, Sep: 63 °FEast Pasadena, Oct: 57 °FEast Pasadena, Nov: 50 °FEast Pasadena, Dec: 45 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Altadena high686972767883889189837567
East Pasadena high686972757782878988827467
Altadena low454649515558626462564945
East Pasadena low464750525660646463575045

Monthly precipitation

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

AltadenaEast Pasadena
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 inEast Pasadena, Jan: 3.3 inEast Pasadena, Feb: 3.5 inEast Pasadena, Mar: 2.2 inEast Pasadena, Apr: 0.9 inEast Pasadena, May: 0.4 inEast Pasadena, Jun: 0.1 inEast Pasadena, Jul: 0.1 inEast Pasadena, Aug: 0.0 inEast Pasadena, Sep: 0.1 inEast Pasadena, Oct: 0.6 inEast Pasadena, Nov: 0.8 inEast Pasadena, Dec: 2.2 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Altadena3.43.72.51.00.50.10.10.00.20.70.92.3
East Pasadena3.33.52.20.90.40.10.10.00.10.60.82.2

Monthly sunny days

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

AltadenaEast Pasadena
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 daysEast Pasadena, Jan: 19 daysEast Pasadena, Feb: 18 daysEast Pasadena, Mar: 21 daysEast Pasadena, Apr: 23 daysEast Pasadena, May: 24 daysEast Pasadena, Jun: 27 daysEast Pasadena, Jul: 29 daysEast Pasadena, Aug: 30 daysEast Pasadena, Sep: 28 daysEast Pasadena, Oct: 27 daysEast Pasadena, Nov: 24 daysEast Pasadena, Dec: 21 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Altadena201721232528293029272422
East Pasadena191821232427293028272421

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

East Pasadena vs another city

See the full East Pasadena, 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).