Climate Fullerton - California
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 68 | 68 | 70 | 73 | 75 | 78 |
| Average low in ºF Av. low Lo | 45 | 48 | 50 | 52 | 58 | 61 |
| Av. precipitation in inch Av. precip. Pre. | 3.03 | 3.25 | 2.16 | 0.87 | 0.25 | 0.09 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 83 | 85 | 84 | 78 | 72 | 67 |
| Average low in ºF Av. low Lo | 65 | 65 | 63 | 57 | 50 | 45 |
| Av. precipitation in inch Av. precip. Pre. | 0.04 | 0.05 | 0.24 | 0.75 | 1.10 | 2.05 |
Fullerton Climate Graph - California Climate Chart
Daily normals Fullerton - California - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 67.6 | 44.2 | 0.12 | 0.12 | 0.00 | 0.00 |
| 2 Jan | 67.7 | 44.2 | 0.24 | 0.24 | 0.00 | 0.00 |
| 3 Jan | 67.7 | 44.2 | 0.35 | 0.35 | 0.00 | 0.00 |
| 4 Jan | 67.7 | 44.2 | 0.43 | 0.43 | 0.00 | 0.00 |
| 5 Jan | 67.8 | 44.2 | 0.55 | 0.55 | 0.00 | 0.00 |
| 6 Jan | 67.8 | 44.2 | 0.67 | 0.67 | 0.00 | 0.00 |
| 7 Jan | 67.8 | 44.2 | 0.79 | 0.79 | 0.00 | 0.00 |
| 8 Jan | 67.9 | 44.2 | 0.91 | 0.91 | 0.00 | 0.00 |
| 9 Jan | 67.9 | 44.2 | 0.98 | 0.98 | 0.00 | 0.00 |
| 10 Jan | 67.9 | 44.3 | 1.10 | 1.10 | 0.00 | 0.00 |
| 11 Jan | 67.9 | 44.3 | 1.22 | 1.22 | 0.00 | 0.00 |
| 12 Jan | 67.9 | 44.3 | 1.34 | 1.34 | 0.00 | 0.00 |
Weather history Fullerton - May 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 May | 75.0 | 60.1 | 0.00 | - | - |
| 02 May | 73.0 | 59.0 | 0.00 | - | - |
| 03 May | 70.0 | 57.9 | 0.00 | - | - |
| 04 May | 70.0 | 55.9 | 0.03 | - | - |
| 05 May | 70.0 | 55.9 | 0.03 | - | - |
| 06 May | 75.0 | 55.0 | 0.00 | - | - |
| 07 May | 75.9 | 57.0 | 0.00 | - | - |
| 08 May | 75.9 | 61.0 | 0.00 | - | - |
| 09 May | 77.0 | 61.0 | 0.00 | - | - |
| 10 May | 77.0 | 61.0 | 0.00 | - | - |
| 11 May | 84.9 | 57.9 | 0.00 | - | - |
| 12 May | 70.0 | 59.0 | 0.00 | - | - |
| 13 May | 73.9 | 60.1 | 0.00 | - | - |
| 14 May | 73.0 | 59.0 | 0.00 | 0.00 | 0.0 |
| 15 May | 73.0 | 61.0 | 0.00 | 0.00 | 0.0 |
| 16 May | 73.0 | 61.0 | 0.00 | 0.00 | 0.0 |
| 17 May | 72.0 | 59.0 | 0.00 | - | - |
| 18 May | 75.0 | 61.0 | 0.00 | - | - |
| 19 May | 89.1 | 55.9 | 0.00 | - | - |
| 20 May | 89.1 | 57.0 | 0.00 | - | - |
| 21 May | 79.0 | 61.0 | 0.00 | - | - |
| 22 May | 73.0 | 61.0 | 0.00 | - | - |
| 23 May | 75.9 | 62.1 | 0.00 | - | - |
| 24 May | 73.9 | 60.1 | 0.00 | - | - |
| 25 May | 73.0 | 57.0 | 0.00 | - | - |
| 26 May | 71.1 | 60.1 | T | - | - |
| 27 May | 70.0 | 57.9 | 0.00 | - | - |
| 28 May | 72.0 | 55.0 | 0.00 | - | - |
| 29 May | 73.9 | 59.0 | T | - | - |
| 30 May | 79.0 | 55.9 | 0.00 | - | - |
| 31 May | 79.0 | 60.1 | 0.00 | - | - |
Past weather Fullerton
| May 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 75.2 ºF | 68 ºF | |
| Average low temperature Av. low temp. | 58.8 ºF | 45 ºF | |
| Total precipitation Total precip. | 0.06 inch | 3.03 inch | |
| Total snowfall Total snowfall | - inch | 0 inch | |
| Highest max temperature Highest max temp. | 89.1 ºF | - | |
| Lowest max temperature Lowest max temp. | 70.0 ºF | - | |
| Highest min temperature Highest min temp. | 62.1 ºF | - | |
| Lowest min temperature Lowest min temp. | 55.0 ºF | - | |
Past weather May 2026 incomplete - Missing data
Geo Fullerton - California
| Country | United States | |
|---|---|---|
| State | California | |
| County | - | |
| City | Fullerton | |
| Zip Code | 92831 | |
| Longitude | -117.92 dec. degr. | |
| Latitude | 33.87 dec. degr. | |
| Altitude - Elevation | 164ft | |
| ICAO | - | |
| IATA | - |
Date and Time Fullerton - California
| Local Time | 09:52 PM | |
|---|---|---|
| Sunrise | 05:39 AM | |
| Sunset | 08:00 PM | |
| Day/Night | Night | |
| Timezone | (UTC-08:00) Pacific Time (US & Canada) | |
| Timezone DB | America - Los Angeles |
Map of Fullerton - California
USGS National Map — Open interactive map
Fullerton weather averages
| Annual high temperature | 75ºF |
| Annual low temperature | 55ºF |
| Average annual precip. | 13.88 inch |
Station Data
Monthly averages Fullerton
Longitude: -117.924, Latitude: 33.8704
Average weather Fullerton, CA - 92831
Monthly: 1991-2020 normals
History: 2015-2026
Abbreviations
Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...