Climateby Month

West Covina, CA climate by month

NOAA 1991-2020 normals · 385 ft elevation

West Covina has warm summers and mild winters. Highs peak at 84°F in August and fall to 67°F in December. The wettest month is February (about 8 wet days) and the driest is August (about 0). By our comfort score the best month is May.

Warmest month
84°F
August normal high
Coldest month
48°F
December normal low
Wet days a year
45
22.5 in of precipitation
Muggy days a year
8
dew point 65°F or higher

How warm is West Covina?

Normal highs range from 67°F in December to 84°F in August.

40°50°60°70°80°90° January: normal high 68°F (20°C), low 49°F (9°C) February: normal high 68°F (20°C), low 50°F (10°C) March: normal high 70°F (21°C), low 52°F (11°C) April: normal high 72°F (22°C), low 55°F (13°C) May: normal high 74°F (23°C), low 58°F (14°C) June: normal high 77°F (25°C), low 61°F (16°C) July: normal high 82°F (28°C), low 65°F (18°C) August: normal high 84°F (29°C), low 65°F (18°C) 84° 65° September: normal high 83°F (28°C), low 64°F (18°C) October: normal high 79°F (26°C), low 60°F (16°C) November: normal high 73°F (23°C), low 53°F (12°C) December: normal high 67°F (19°C), low 48°F (9°C) 67° 48° JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is West Covina?

February has the most wet days (about 8); the year brings about 23 in of precipitation.

January: 7 wet days February: 8 wet days 8 March: 7 wet days April: 4 wet days May: 4 wet days June: 2 wet days July: 1 wet days August: 0 wet days 0 September: 1 wet days October: 3 wet days November: 4 wet days December: 6 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How humid is West Covina?

Muggy days peak in August, at about 3 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 0 muggy days July: 3 muggy days August: 3 muggy days 3 September: 2 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Long Beach / Daugherty Field / Airport, 21 mi SW of the city center (the nearest airport with complete hourly records).

How much daylight?

Daylight ranges from about 9.9 hours in December to 14.4 hours in June.

January: 10.2 hours of daylight February: 11.0 hours of daylight March: 12.0 hours of daylight April: 13.1 hours of daylight May: 13.9 hours of daylight June: 14.4 hours of daylight 14.4 July: 14.2 hours of daylight August: 13.4 hours of daylight September: 12.4 hours of daylight October: 11.3 hours of daylight November: 10.4 hours of daylight December: 9.9 hours of daylight 9.9 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for West Covina, 1991-2020
MonthHighLowPrecip.Wet daysMuggy daysDaylight
January 68°F49°F 5.2 in7 0 10.2 h
February 68°F50°F 5.7 in8 0 11.0 h
March 70°F52°F 3.4 in7 0 12.0 h
April 72°F55°F 1.3 in4 0 13.1 h
May 74°F58°F 0.8 in4 0 13.9 h
June 77°F61°F 0.2 in2 0 14.4 h
July 82°F65°F 0.09 in1 3 14.2 h
August 84°F65°F 0.0 in0 3 13.4 h
September 83°F64°F 0.2 in1 2 12.4 h
October 79°F60°F 1.1 in3 0 11.3 h
November 73°F53°F 1.3 in4 0 10.4 h
December 67°F48°F 3.3 in6 0 9.9 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit West Covina

By our comfort score, the best month is May.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 671850
Feb 671660
Mar 762141
Apr 812221
May 872521
Jun 831911
Jul 67903
Aug 58506
Sep 59716
Oct 681614
Nov 742121
Dec 691940

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in West Covina

A night at 32°F or below happens in about 15% of years in West Covina, so there is no typical frost date. In most years there is no frost at all.

Station: San Gabriel Fire Dept (USC00047785), NOAA 1991-2020 freeze probabilities. Frost dates for every city in California.

Hottest and coldest readings, 1991-2020

The highest reading was 113°F (September 27, 2010); the lowest was 34°F (January 14, 2013).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near West Covina

Similar climates elsewhere

Where the numbers come from

  • Temperature: Los Angeles Downtown Usc Campus (USW00093134), 17 mi W of the city center, 230 ft (155 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Rain: San Gabriel Canyon PH (USC00047776), 6.2 mi NNE of the city center, 744 ft (359 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Snowfall and snow depth: Covina City Yard Fc387b (USC00042090), 3.7 mi ENE of the city center, 607 ft (222 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Frost dates: San Gabriel Fire Dept (USC00047785), 9.3 mi W of the city center, 363 ft . NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour: Los Angeles Intl Airport (USW00023174), 27 mi WSW of the city center, 97 ft (288 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Cloud cover: Burbank Glendale Pasadena Airport (USW00023152), 26 mi WNW of the city center, 741 ft (356 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Long Beach / Daugherty Field / Airport (722970-23129), 21 mi SW of the city center, 33 ft (352 ft lower than the city). Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error