UTC Offset
UTC-07:00
Fullerton, United States Snapshot 2026
Where is Fullerton?
Fullerton, United States
- Continent
- Americas
- Country
- United States
- City
- Fullerton
- Population
- 140.8K
- Elevation
- 50 m
- Coordinates
- 33.87°, -117.93°
Fullerton is a city in United States with a population of approximately 140.8K. Average temperatures range from 7°C (45°F) in January to 32°C (90°F) in August. The best time to visit is April, May, June, September, October.
Time in Fullerton right now
Open full time & time zone page 10:45 45
Monday, June 15, 2026
IANA time zone
America/Los_Angeles
Daylight saving
DST in effect
PST / PDT
Next DST change
November 1
backward -1h
Live weather in Fullerton
Daylight in Fullerton today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 24m
Climate normals for Fullerton
Long-term monthly averages based on historical data.
January
Good 
February
Good March
Good April best
Excellent May best
Excellent June best
Excellent July
Good August
Excellent September best
Excellent October best
Excellent November
Excellent December
Good | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 19°C / 7°C | 17°C / 5°C | 6days (73 mm) Good | 8.2h Good | 72% Muggy | 3.7 Moderate | Good | View Details |
| February | 20°C / 8°C | 18°C / 5°C | 5days (61 mm) Good | 9h Good | 68% Muggy | 4.4 Moderate | Good | View Details |
| March | 20°C / 9°C | 19°C / 8°C | 8days (59 mm) Wet | 10.1h Excellent | 72% Muggy | 6.1 High | Good | View Details |
| April best | 24°C / 12°C | 23°C / 11°C | 2days (16 mm) Excellent | 11.4h Excellent | 66% Muggy | 7.2 Very High | Excellent | View Details |
| May best | 24°C / 14°C | 24°C / 13°C | 2days (7 mm) Excellent | 12h Excellent | 68% Muggy | 7.8 Very High | Excellent | View Details |
| June best | 28°C / 16°C | 29°C / 17°C | 1days (2 mm) Excellent | 13h Excellent | 65% Muggy | 8.3 Very High | Excellent | View Details |
| July | 31°C / 19°C | 33°C / 20°C | 0days (1 mm) Excellent | 13.2h Excellent | 63% Muggy | 8.5 Very High | Good | View Details |
| August | 32°C / 19°C | 34°C / 21°C | 0days (6 mm) Excellent | 12.1h Excellent | 64% Muggy | 7.9 Very High | Excellent | View Details |
| September best | 31°C / 19°C | 32°C / 20°C | 1days (5 mm) Excellent | 11.2h Excellent | 65% Muggy | 7 High | Excellent | View Details |
| October best | 28°C / 15°C | 27°C / 15°C | 2days (9 mm) Excellent | 10.1h Excellent | 62% Muggy | 5.6 High | Excellent | View Details |
| November | 24°C / 11°C | 22°C / 9°C | 3days (27 mm) Excellent | 9h Good | 61% Muggy | 4.2 Moderate | Excellent | View Details |
| December | 20°C / 8°C | 18°C / 6°C | 5days (57 mm) Good | 7.9h Good | 68% Muggy | 3.4 Moderate | Good | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 19°C / 7°C . Feb: 20°C / 8°C . Mar: 20°C / 9°C . Apr: 24°C / 12°C . May: 24°C / 14°C . Jun: 28°C / 16°C . Jul: 31°C / 19°C . Aug: 32°C / 19°C . Sep: 31°C / 19°C . Oct: 28°C / 15°C . Nov: 24°C / 11°C . Dec: 20°C / 8°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 73 mm. Feb: 61 mm. Mar: 59 mm. Apr: 16 mm. May: 7 mm. Jun: 2 mm. Jul: 1 mm. Aug: 6 mm. Sep: 5 mm. Oct: 9 mm. Nov: 27 mm. Dec: 57 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 72%. Feb: 68%. Mar: 72%. Apr: 66%. May: 68%. Jun: 65%. Jul: 63%. Aug: 64%. Sep: 65%. Oct: 62%. Nov: 61%. Dec: 68%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 16 km/h . Mar: 18 km/h . Apr: 18 km/h . May: 17 km/h . Jun: 16 km/h . Jul: 16 km/h . Aug: 16 km/h . Sep: 16 km/h . Oct: 15 km/h . Nov: 14 km/h . Dec: 13 km/h .
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 15°C . Feb: 15°C . Mar: 15°C . Apr: 16°C . May: 18°C . Jun: 20°C . Jul: 21°C . Aug: 22°C . Sep: 22°C . Oct: 20°C . Nov: 18°C . Dec: 16°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 4. Feb: UV 4. Mar: UV 6. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 9. Aug: UV 8. Sep: UV 7. Oct: UV 6. Nov: UV 4. Dec: UV 3.
Frequently Asked Questions
Fullerton has a population of approximately 140.8K.
The best months to visit Fullerton are April, May, June, September, October, when temperatures are pleasant and rainfall is lower.
Fullerton receives approximately 323mm of rainfall annually across 35 rainy days.
Fullerton is located in United States, in the Americas region.
Fullerton sits at an elevation of 50 m (164 ft) above sea level.