Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Saint Marys features a humid subtropical climate (Cfa). Temperatures typically range between -1 °C (31 °F) and 27 °C (81 °F) through the year, but rarely can drop to -26 °C (-15 °F) or can rise to as high as 40 °C (104 °F). The average annual precipitation amounts to about 1008 mm (39.7 inches) and receives 94 rainy days on the 1 mm (0.04 inches) threshold annually. Saint Marys enjoys an average of 3159 hours of sunshine throughout the year, and daylight varies from 9 hours 26 minutes to 14 hours 51 minutes per day.
The warmest months in Saint Marys are June, July and August, with daily mean temperatures ranging from 25 to 27 °C (77 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 3 °C (31 - 37 °F) throughout the day. On average each year, Saint Marys experiences 120 days above 25 °C (77.0 °F) and 93 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 18°C (65°F) |
26°C (78°F) |
33°C (93°F) |
31°C (89°F) |
36°C (97°F) |
40°C (104°F) |
39°C (103°F) |
37°C (99°F) |
36°C (96°F) |
34°C (93°F) |
28°C (82°F) |
23°C (73°F) |
| Mean maximum | 16°C (61°F) |
21°C (70°F) |
27°C (82°F) |
30°C (85°F) |
32°C (90°F) |
35°C (96°F) |
38°C (100°F) |
35°C (96°F) |
34°C (94°F) |
32°C (90°F) |
23°C (74°F) |
19°C (67°F) |
| Average high | 5°C (41°F) |
6°C (43°F) |
14°C (58°F) |
19°C (66°F) |
24°C (75°F) |
31°C (88°F) |
32°C (90°F) |
30°C (87°F) |
28°C (83°F) |
20°C (67°F) |
13°C (55°F) |
9°C (48°F) |
| Daily mean | -1°C (31°F) |
0°C (32°F) |
8°C (46°F) |
12°C (54°F) |
19°C (66°F) |
25°C (78°F) |
27°C (81°F) |
25°C (77°F) |
22°C (72°F) |
13°C (57°F) |
6°C (44°F) |
3°C (37°F) |
| Average low | -5°C (23°F) |
-5°C (23°F) |
2°C (37°F) |
6°C (43°F) |
14°C (57°F) |
20°C (68°F) |
22°C (71°F) |
20°C (67°F) |
17°C (62°F) |
8°C (47°F) |
1°C (34°F) |
-2°C (28°F) |
| Mean minimum | -17°C (2°F) |
-17°C (2°F) |
-9°C (15°F) |
-4°C (26°F) |
5°C (41°F) |
13°C (56°F) |
17°C (62°F) |
14°C (57°F) |
8°C (47°F) |
-2°C (28°F) |
-9°C (16°F) |
-12°C (11°F) |
| Minimum | -23°C (-9°F) |
-26°C (-15°F) |
-19°C (-1°F) |
-8°C (18°F) |
3°C (37°F) |
10°C (50°F) |
14°C (58°F) |
12°C (54°F) |
6°C (43°F) |
-4°C (25°F) |
-14°C (7°F) |
-18°C (-0°F) |
Compare temperature, precipitation, sunshine, UV index in Saint Marys, Kansas, United States with other places around the world.
Saint Marys usually has the most precipitation in May, August and October, with an average of 10 rainy days and 148 mm (5.8 inches) of precipitation per month. The driest months in Saint Marys are February, November and December. On average, 30 mm (1.2 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 38 (1.5) | 27 (1.1) | 93 (3.7) | 78 (3.1) | 205 (8.1) | 96 (3.8) | 90 (3.6) | 130 (5.1) | 80 (3.1) | 109 (4.3) | 32 (1.3) | 30 (1.2) |
| Average precipitation days (≥ 1 mm) | 5 | 5 | 10 | 9 | 14 | 9 | 8 | 10 | 8 | 8 | 5 | 3 |
The sunniest months in Saint Marys are June, July and August, when the sun shines an average of 11 hours 22 minutes a day. Least sunny months in Saint Marys: January, February and November receive an average of 6 hours 33 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 163 | 206 | 224 | 268 | 272 | 347 | 373 | 325 | 281 | 250 | 220 | 226 |
| Mean daily daylight hours | 9h 45m | 10h 44m | 11h 58m | 13h 15m | 14h 20m | 14h 51m | 14h 34m | 13h 36m | 12h 23m | 11h 7m | 10h 0m | 9h 26m |
Saint Marys experiences the highest level of ultraviolet (UV) radiation in June, July 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 Saint Marys 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 | 11 | 10 | 9 | 6 | 4 | 3 |
Discover in-depth weather details for every month in Saint Marys. 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 Saint Marys'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.