Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Fullerton features a humid continental climate (Dfa). Temperatures typically range between -4 °C (25 °F) and 25 °C (78 °F) through the year, but rarely can drop to -34 °C (-28 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 787 mm (31.0 inches) and receives 91 rainy days on the 1 mm (0.04 inches) threshold annually. Fullerton enjoys an average of 3189 hours of sunshine throughout the year, and daylight varies from 9 hours 13 minutes to 15 hours 6 minutes per day.
The warmest months in Fullerton are June, July and August, with daily mean temperatures ranging from 23 to 25 °C (74 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -1 °C (25 - 31 °F) throughout the day. On average each year, Fullerton experiences 103 days above 25 °C (77.0 °F) and 126 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 15°C (59°F) |
23°C (73°F) |
26°C (79°F) |
31°C (88°F) |
36°C (97°F) |
38°C (101°F) |
38°C (101°F) |
35°C (96°F) |
35°C (96°F) |
33°C (92°F) |
28°C (83°F) |
20°C (68°F) |
| Mean maximum | 12°C (54°F) |
16°C (60°F) |
23°C (74°F) |
28°C (83°F) |
32°C (90°F) |
34°C (94°F) |
36°C (97°F) |
34°C (93°F) |
34°C (94°F) |
30°C (87°F) |
22°C (72°F) |
16°C (60°F) |
| Average high | 2°C (35°F) |
2°C (36°F) |
11°C (52°F) |
16°C (61°F) |
22°C (71°F) |
30°C (86°F) |
31°C (87°F) |
29°C (84°F) |
27°C (80°F) |
17°C (63°F) |
11°C (52°F) |
5°C (41°F) |
| Daily mean | -4°C (26°F) |
-4°C (25°F) |
4°C (40°F) |
9°C (49°F) |
16°C (61°F) |
24°C (75°F) |
25°C (78°F) |
23°C (74°F) |
20°C (69°F) |
11°C (52°F) |
4°C (40°F) |
-1°C (31°F) |
| Average low | -8°C (17°F) |
-9°C (16°F) |
-1°C (30°F) |
3°C (38°F) |
11°C (52°F) |
18°C (64°F) |
20°C (68°F) |
18°C (64°F) |
14°C (58°F) |
5°C (41°F) |
-1°C (30°F) |
-6°C (22°F) |
| Mean minimum | -20°C (-4°F) |
-21°C (-5°F) |
-11°C (12°F) |
-7°C (20°F) |
2°C (37°F) |
11°C (53°F) |
14°C (58°F) |
11°C (52°F) |
6°C (43°F) |
-5°C (23°F) |
-10°C (15°F) |
-16°C (3°F) |
| Minimum | -25°C (-13°F) |
-34°C (-28°F) |
-21°C (-5°F) |
-13°C (10°F) |
0°C (33°F) |
9°C (49°F) |
13°C (56°F) |
9°C (48°F) |
4°C (40°F) |
-8°C (17°F) |
-15°C (5°F) |
-22°C (-7°F) |
Compare temperature, precipitation, sunshine, UV index in Fullerton, Nebraska, United States with other places around the world.
Fullerton usually has the most precipitation in March, May and June, with an average of 10 rainy days and 110 mm (4.3 inches) of precipitation per month. The driest months in Fullerton are January, February and November. On average, 24 mm (0.9 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 28 (1.1) | 20 (0.8) | 89 (3.5) | 57 (2.2) | 142 (5.6) | 97 (3.8) | 65 (2.5) | 84 (3.3) | 57 (2.2) | 83 (3.3) | 22 (0.9) | 42 (1.6) |
| Average precipitation days (≥ 1 mm) | 4 | 6 | 9 | 9 | 13 | 8 | 8 | 10 | 7 | 9 | 4 | 4 |
The sunniest months in Fullerton are June, July and August, when the sun shines an average of 11 hours 29 minutes a day. Least sunny months in Fullerton: January, February and December receive an average of 6 hours 35 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 158 | 216 | 227 | 268 | 278 | 359 | 374 | 322 | 287 | 244 | 226 | 224 |
| Mean daily daylight hours | 9h 33m | 10h 37m | 11h 58m | 13h 21m | 14h 31m | 15h 6m | 14h 46m | 13h 44m | 12h 24m | 11h 2m | 9h 50m | 9h 13m |
Fullerton experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure. January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Fullerton UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 3 | 5 | 6 | 9 | 10 | 11 | 10 | 10 | 8 | 6 | 4 | 3 |
Discover in-depth weather details for every month in Fullerton. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Fullerton's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.
Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.