Climateby Month

Oceanside, CA climate by month

NOAA 1991-2020 normals · 70 ft elevation · also covers Carlsbad

Oceanside is mild year-round, with normal highs between 62°F in March and 71°F in August. The wettest month is January (about 6 wet days) and the driest is August (about 0). The most comfortable time to visit is June and October.

Warmest month
71°F
August normal high
Coldest month
47°F
December normal low
Wet days a year
34
10.3 in of precipitation
Muggy days a year
4
dew point 65°F or higher

How warm is Oceanside?

Normal highs range from 62°F in March to 71°F in August.

40°50°60°70°80° January: normal high 63°F (17°C), low 47°F (8°C) February: normal high 62°F (17°C), low 48°F (9°C) 62° 48° March: normal high 62°F (17°C), low 51°F (11°C) April: normal high 63°F (17°C), low 53°F (12°C) May: normal high 65°F (18°C), low 58°F (14°C) June: normal high 66°F (19°C), low 61°F (16°C) July: normal high 70°F (21°C), low 65°F (18°C) August: normal high 71°F (22°C), low 66°F (19°C) 71° 66° September: normal high 71°F (22°C), low 64°F (18°C) October: normal high 70°F (21°C), low 58°F (14°C) November: normal high 67°F (19°C), low 51°F (11°C) December: normal high 63°F (17°C), low 47°F (8°C) JFMAMJJASOND

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

How rainy is Oceanside?

January has the most wet days (about 6); the year brings about 10 in of precipitation.

January: 6 wet days 6 February: 6 wet days March: 5 wet days April: 3 wet days May: 2 wet days June: 1 wet days July: 1 wet days August: 0 wet days 0 September: 1 wet days October: 2 wet days November: 3 wet days December: 5 wet days JFMAMJJASOND

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

How humid is Oceanside?

Muggy days peak in July, at about 2 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: 2 muggy days 2 August: 1 muggy days September: 1 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 Marine Corps Air Station, 7.6 mi N of the city center.

How much daylight?

Daylight ranges from about 10.0 hours in December to 14.3 hours in June.

January: 10.2 hours of daylight February: 11.0 hours of daylight March: 12.0 hours of daylight April: 13.0 hours of daylight May: 13.9 hours of daylight June: 14.3 hours of daylight 14.3 July: 14.1 hours of daylight August: 13.3 hours of daylight September: 12.4 hours of daylight October: 11.3 hours of daylight November: 10.5 hours of daylight December: 10.0 hours of daylight 10.0 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Oceanside, 1991-2020
MonthHighLowPrecip.Wet daysMuggy daysDaylight
January 63°F47°F 2.2 in6 0 10.2 h
February 62°F48°F 2.4 in6 0 11.0 h
March 62°F51°F 1.4 in5 0 12.0 h
April 63°F53°F 0.8 in3 0 13.0 h
May 65°F58°F 0.3 in2 0 13.9 h
June 66°F61°F 0.08 in1 0 14.3 h
July 70°F65°F 0.04 in1 2 14.1 h
August 71°F66°F 0.02 in0 1 13.3 h
September 71°F64°F 0.2 in1 1 12.4 h
October 70°F58°F 0.6 in2 0 11.3 h
November 67°F51°F 0.8 in3 0 10.5 h
December 63°F47°F 1.6 in5 0 10.0 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 Oceanside

By our comfort score, the best months are June and October.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 56950
Feb 54650
Mar 58630
Apr 671020
May 771610
Jun 852000
Jul 761400
Aug 711200
Sep 781900
Oct 822510
Nov 711820
Dec 581030

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 Oceanside

The last spring frost typically comes around Jan 23, and the first fall frost around Dec 11, leaving 325 frost-free days in a typical year.

Frost and freeze dates for Oceanside
Typical date1 year in 10
Last spring frost (32°F)Jan 23after Feb 22
First fall frost (32°F)Dec 11before Nov 21
Hard freeze (28°F)in about 41% of years; no typical date
Frost-free season325 daysunder 287 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Oceanside Muni Airport (USW00053121), NOAA 1991-2020 freeze probabilities. Frost dates for every city in California.

Hottest and coldest readings, 1991-2020

The highest reading was 100°F (October 9, 1994); the lowest was 30°F (January 15, 2007, and 1 other day).

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

Near Oceanside

Similar climates elsewhere

Also covers

Carlsbad uses the same temperature and rain stations as Oceanside, so its monthly numbers are the ones on this page.

Where the numbers come from

  • Temperature, rain, snowfall and snow depth: Oceanside Marina (USC00046377), 1.3 mi NW of the city center, 10 ft (60 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Frost dates: Oceanside Muni Airport (USW00053121), 2.4 mi NE of the city center, 28 ft . NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour: Camp Pendleton MCAS (USW00003154), 7.4 mi NNE of the city center, 75 ft . NOAA normals and daily records, 1991-2020.
  • Cloud cover: March AFB (USW00023119), 49 mi N of the city center, 1,516 ft (1,446 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Marine Corps Air Station (722926-03154), 7.6 mi N of the city center, 70 ft . Hourly observations, 1991-2020.

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