UTC Offset
UTC-04:00
Fullerton, United States Snapshot 2026
Where is Fullerton?
Fullerton, United States
- Continent
- Americas
- Country
- United States
- City
- Fullerton
- Population
- 14.9K
- Elevation
- 113 m
- Coordinates
- 40.63°, -75.47°
Fullerton is a city in United States with a population of approximately 14.9K. Average temperatures range from -4°C (25°F) in January to 30°C (86°F) in July. The best time to visit is May, June, July, August, September. The city sits at an elevation of 113 m above sea level.
Time in Fullerton right now
Open full time & time zone page 22:40 40
Monday, June 15, 2026
IANA time zone
America/New_York
Daylight saving
DST in effect
EST / EDT
Next DST change
November 1
backward -1h
Live weather in Fullerton
Daylight in Fullerton today
View full sunrise & sunset page Sunrise
Sunset
Day length
15h 04m
Climate normals for Fullerton
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Fair May best
Excellent June best
Excellent July best
Good August best
Excellent September best
Excellent October
Good November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 4°C / -4°C | 0°C / -8°C | 9days (92 mm) Wet | 5.8h Fair | 67% Muggy | 2.3 Moderate | Poor | View Details |
| February | 6°C / -3°C | 3°C / -7°C | 10days (96 mm) Wet | 6.6h Fair | 69% Muggy | 3.3 Moderate | Poor | View Details |
| March | 11°C / 0°C | 7°C / -4°C | 11days (92 mm) Wet | 8.1h Good | 67% Muggy | 4.4 Moderate | Poor | View Details |
| April | 16°C / 6°C | 15°C / 2°C | 11days (112 mm) Wet | 8.7h Good | 67% Muggy | 5.1 High | Fair | View Details |
| May best | 22°C / 11°C | 22°C / 10°C | 13days (120 mm) Wet | 9.3h Good | 73% Muggy | 5.7 High | Excellent | View Details |
| June best | 27°C / 16°C | 28°C / 16°C | 12days (94 mm) Wet | 11.1h Excellent | 71% Muggy | 6.6 High | Excellent | View Details |
| July best | 30°C / 20°C | 33°C / 22°C | 13days (122 mm) Wet | 11.5h Excellent | 72% Muggy | 7 High | Good | View Details |
| August best | 28°C / 19°C | 30°C / 20°C | 11days (115 mm) Wet | 10.3h Excellent | 74% Muggy | 6.1 High | Excellent | View Details |
| September best | 25°C / 15°C | 26°C / 15°C | 10days (102 mm) Wet | 8.6h Good | 73% Muggy | 4.9 Moderate | Excellent | View Details |
| October | 19°C / 10°C | 18°C / 8°C | 9days (92 mm) Wet | 7.3h Good | 74% Muggy | 3.9 Moderate | Good | View Details |
| November | 11°C / 3°C | 8°C / -1°C | 8days (85 mm) Wet | 6.8h Fair | 71% Muggy | 2.8 Moderate | Poor | View Details |
| December | 6°C / -2°C | 2°C / -6°C | 11days (109 mm) Wet | 5.5h Fair | 72% Muggy | 2 Low | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 4°C / -4°C . Feb: 6°C / -3°C . Mar: 11°C / 0°C . Apr: 16°C / 6°C . May: 22°C / 11°C . Jun: 27°C / 16°C . Jul: 30°C / 20°C . Aug: 28°C / 19°C . Sep: 25°C / 15°C . Oct: 19°C / 10°C . Nov: 11°C / 3°C . Dec: 6°C / -2°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 92 mm. Feb: 96 mm. Mar: 92 mm. Apr: 112 mm. May: 120 mm. Jun: 94 mm. Jul: 122 mm. Aug: 115 mm. Sep: 102 mm. Oct: 92 mm. Nov: 85 mm. Dec: 109 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 67%. Feb: 69%. Mar: 67%. Apr: 67%. May: 73%. Jun: 71%. Jul: 72%. Aug: 74%. Sep: 73%. Oct: 74%. Nov: 71%. Dec: 72%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 17 km/h . Mar: 18 km/h . Apr: 18 km/h . May: 15 km/h . Jun: 14 km/h . Jul: 12 km/h . Aug: 12 km/h . Sep: 13 km/h . Oct: 15 km/h . Nov: 17 km/h . Dec: 16 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
Fullerton has a population of approximately 14.9K.
The best months to visit Fullerton are May, June, July, August, September, when temperatures are pleasant and rainfall is lower.
Fullerton receives approximately 1231mm of rainfall annually across 128 rainy days.
Fullerton is located in United States, in the Americas region.
Fullerton sits at an elevation of 113 m (371 ft) above sea level.