Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Grand Island features a humid continental climate (Dfa). Temperatures typically range between -4 °C (26 °F) and 25 °C (78 °F) through the year, but rarely can drop to -33 °C (-27 °F) or can rise to as high as 39 °C (103 °F). The average annual precipitation amounts to about 771 mm (30.3 inches) and receives 86 rainy days on the 1 mm (0.04 inches) threshold annually. Grand Island enjoys an average of 3185 hours of sunshine throughout the year, and daylight varies from 9 hours 16 minutes to 15 hours 3 minutes per day.
The warmest months in Grand Island are June, July and August, with daily mean temperatures ranging from 24 to 25 °C (75 - 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 (26 - 31 °F) throughout the day. On average each year, Grand Island experiences 104 days above 25 °C (77.0 °F) and 124 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 15°C (60°F) |
23°C (74°F) |
26°C (80°F) |
31°C (88°F) |
36°C (97°F) |
39°C (103°F) |
38°C (100°F) |
36°C (97°F) |
36°C (96°F) |
33°C (92°F) |
28°C (83°F) |
21°C (70°F) |
| Mean maximum | 13°C (56°F) |
16°C (61°F) |
24°C (75°F) |
28°C (83°F) |
32°C (90°F) |
34°C (94°F) |
36°C (97°F) |
34°C (94°F) |
34°C (94°F) |
30°C (87°F) |
23°C (73°F) |
16°C (61°F) |
| Average high | 2°C (36°F) |
3°C (37°F) |
11°C (52°F) |
16°C (62°F) |
22°C (72°F) |
30°C (86°F) |
31°C (87°F) |
29°C (85°F) |
27°C (81°F) |
17°C (63°F) |
11°C (52°F) |
5°C (42°F) |
| Daily mean | -3°C (26°F) |
-4°C (26°F) |
5°C (41°F) |
10°C (50°F) |
16°C (62°F) |
24°C (75°F) |
25°C (78°F) |
24°C (75°F) |
21°C (69°F) |
11°C (52°F) |
5°C (41°F) |
-1°C (31°F) |
| Average low | -8°C (18°F) |
-9°C (16°F) |
-1°C (31°F) |
3°C (38°F) |
11°C (52°F) |
18°C (64°F) |
20°C (68°F) |
18°C (65°F) |
15°C (58°F) |
5°C (41°F) |
-1°C (30°F) |
-6°C (22°F) |
| Mean minimum | -20°C (-3°F) |
-20°C (-4°F) |
-11°C (12°F) |
-7°C (20°F) |
2°C (36°F) |
11°C (53°F) |
14°C (58°F) |
11°C (53°F) |
6°C (43°F) |
-5°C (23°F) |
-9°C (15°F) |
-17°C (2°F) |
| Minimum | -24°C (-10°F) |
-33°C (-27°F) |
-22°C (-7°F) |
-13°C (9°F) |
0°C (33°F) |
9°C (48°F) |
13°C (55°F) |
9°C (48°F) |
4°C (40°F) |
-8°C (17°F) |
-15°C (5°F) |
-23°C (-9°F) |
Compare temperature, precipitation, sunshine, UV index in Grand Island, Nebraska, United States with other places around the world.
Grand Island usually has the most precipitation in May, June and October, with an average of 9 rainy days and 107 mm (4.2 inches) of precipitation per month. The driest months in Grand Island are January, February and November. On average, 23 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) | 19 (0.7) | 86 (3.4) | 56 (2.2) | 147 (5.8) | 89 (3.5) | 66 (2.6) | 71 (2.8) | 59 (2.3) | 86 (3.4) | 21 (0.8) | 42 (1.6) |
| Average precipitation days (≥ 1 mm) | 4 | 5 | 9 | 9 | 13 | 8 | 8 | 8 | 6 | 8 | 4 | 4 |
The sunniest months in Grand Island are June, July and August, when the sun shines an average of 11 hours 27 minutes a day. Least sunny months in Grand Island: January, February and December receive an average of 6 hours 34 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 158 | 215 | 225 | 269 | 278 | 358 | 371 | 323 | 285 | 243 | 228 | 224 |
| Mean daily daylight hours | 9h 36m | 10h 38m | 11h 58m | 13h 20m | 14h 29m | 15h 3m | 14h 44m | 13h 42m | 12h 24m | 11h 3m | 9h 52m | 9h 16m |
Grand Island 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 Grand Island 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 Grand Island. 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 Grand Island'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.