Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Oswego features a humid subtropical climate (Cfa). Temperatures typically range between 2 °C (36 °F) and 27 °C (81 °F) through the year, but rarely can drop to -27 °C (-17 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 1248 mm (49.1 inches) and receives 109 rainy days on the 1 mm (0.04 inches) threshold annually. Oswego enjoys an average of 3089 hours of sunshine throughout the year, and daylight varies from 9 hours 38 minutes to 14 hours 39 minutes per day.
The warmest months in Oswego are June, July and August, with daily mean temperatures ranging from 26 to 27 °C (78 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 6 °C (36 - 42 °F) throughout the day. On average each year, Oswego experiences 128 days above 25 °C (77.0 °F) and 66 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 21°C (70°F) |
28°C (82°F) |
29°C (85°F) |
32°C (89°F) |
33°C (92°F) |
37°C (99°F) |
38°C (101°F) |
36°C (97°F) |
35°C (95°F) |
32°C (90°F) |
25°C (77°F) |
24°C (75°F) |
| Mean maximum | 18°C (64°F) |
23°C (73°F) |
25°C (78°F) |
29°C (84°F) |
32°C (89°F) |
34°C (94°F) |
36°C (97°F) |
35°C (96°F) |
34°C (94°F) |
32°C (89°F) |
23°C (74°F) |
21°C (69°F) |
| Average high | 7°C (46°F) |
9°C (49°F) |
16°C (61°F) |
20°C (68°F) |
25°C (77°F) |
31°C (88°F) |
32°C (90°F) |
31°C (88°F) |
29°C (85°F) |
21°C (71°F) |
15°C (59°F) |
11°C (52°F) |
| Daily mean | 2°C (36°F) |
3°C (38°F) |
10°C (51°F) |
14°C (58°F) |
20°C (68°F) |
26°C (78°F) |
27°C (81°F) |
26°C (79°F) |
24°C (75°F) |
16°C (60°F) |
9°C (48°F) |
6°C (42°F) |
| Average low | -2°C (28°F) |
-2°C (29°F) |
5°C (42°F) |
9°C (48°F) |
15°C (60°F) |
20°C (69°F) |
22°C (73°F) |
21°C (70°F) |
18°C (65°F) |
11°C (51°F) |
3°C (38°F) |
1°C (34°F) |
| Mean minimum | -12°C (10°F) |
-14°C (7°F) |
-7°C (20°F) |
-1°C (30°F) |
7°C (44°F) |
15°C (59°F) |
18°C (64°F) |
16°C (62°F) |
10°C (50°F) |
1°C (33°F) |
-6°C (21°F) |
-8°C (18°F) |
| Minimum | -18°C (-0°F) |
-27°C (-17°F) |
-15°C (6°F) |
-5°C (23°F) |
4°C (40°F) |
12°C (54°F) |
16°C (61°F) |
15°C (59°F) |
7°C (45°F) |
-2°C (28°F) |
-11°C (12°F) |
-12°C (10°F) |
Compare temperature, precipitation, sunshine, UV index in Oswego, Kansas, United States with other places around the world.
Oswego usually has the most precipitation in March, May and October, with an average of 12 rainy days and 164 mm (6.5 inches) of precipitation per month. The driest months in Oswego are February, November and December. On average, 53 mm (2.1 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 67 (2.6) | 65 (2.6) | 128 (5.0) | 124 (4.9) | 239 (9.4) | 96 (3.8) | 98 (3.8) | 117 (4.6) | 94 (3.7) | 127 (5.0) | 53 (2.1) | 40 (1.6) |
| Average precipitation days (≥ 1 mm) | 7 | 7 | 11 | 11 | 14 | 8 | 10 | 11 | 7 | 11 | 7 | 5 |
The sunniest months in Oswego are June, July and August, when the sun shines an average of 11 hours 1 minutes a day. Least sunny months in Oswego: January, February and November receive an average of 6 hours 12 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 155 | 181 | 223 | 251 | 280 | 337 | 356 | 319 | 289 | 249 | 221 | 223 |
| Mean daily daylight hours | 9h 55m | 10h 49m | 11h 59m | 13h 10m | 14h 10m | 14h 39m | 14h 23m | 13h 30m | 12h 22m | 11h 11m | 10h 9m | 9h 38m |
Oswego experiences the highest level of ultraviolet (UV) radiation in April, June and July, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure. January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Oswego UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 3 | 5 | 7 | 10 | 10 | 11 | 11 | 10 | 9 | 7 | 5 | 3 |
Discover in-depth weather details for every month in Oswego. 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 Oswego'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.