Updated October 2026
Ste. Geneviève National Historical Park Weather by Month
Ste. Geneviève National Historical Park is warmest in July, when the nearest NOAA climate station averages a high of 89°F and a low of 68°F, and coldest in January, with an average high of 40°F and an average low of 24°F. May is the wettest month, with about 5.2 inches of precipitation. Snowfall is heaviest in February, at about 1.5 inches.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 5.3 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Ste. Geneviève National Historical Park can differ from these, particularly with elevation.
Warmest month
Jul
89°F avg high
Coldest month
Jan
24°F avg low
Wettest month
May
5.2 in avg
Snowiest month
Feb
1.5 in avg
Longest days
Jun
14.6 h of daylight
Average weather at Ste. Geneviève by month
| Month | Avg high | Avg low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 40°F | 24°F | 2.7 in | 1.4 in | 9.6 h |
| February | 46°F | 27°F | 2.4 in | 1.5 in | 10.6 h |
| March | 56°F | 35°F | 3.4 in | 0.1 in | 11.7 h |
| April | 68°F | 44°F | 4.7 in | 0.0 in | 13.0 h |
| May | 77°F | 55°F | 5.2 in | 0.0 in | 14.1 h |
| June | 86°F | 64°F | 4.1 in | 0.0 in | 14.6 h |
| July | 89°F | 68°F | 4.1 in | 0.0 in | 14.4 h |
| August | 88°F | 66°F | 3.3 in | 0.0 in | 13.5 h |
| September | 81°F | 58°F | 2.9 in | 0.0 in | 12.2 h |
| October | 70°F | 46°F | 3.1 in | 0.0 in | 11.0 h |
| November | 56°F | 37°F | 4.0 in | 0.4 in | 9.9 h |
| December | 44°F | 28°F | 2.9 in | 0.9 in | 9.4 h |
| Year total | 42.8 in | 4.3 in |
NOAA 1991–2020 climate normals from station USC00114629, 5.3 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Ste. Geneviève is at that time of year.
Ste. Geneviève weather by season
Winter: December to February
Average highs bottom out at 40°F in January, between 44°F in December and 46°F in February, with average lows between 24°F and 28°F. The average low is at or below freezing in all three months. Together the three months average 8 inches of precipitation, about 19% of the yearly total and less than in any other season. Snowfall averages about 3.8 inches for the season. Daylight is at its shortest, about 9.4 hours in December.
Spring: March to May
Average highs climb from 56°F in March to 77°F in May, with average lows between 35°F and 55°F. Together the three months average 13.3 inches of precipitation, about 31% of the yearly total and more than in any other season. Snowfall averages about 0.1 inches for the season. Daylight lengthens from about 11.7 hours in March to 14.1 in May.
Summer: June to August
Average highs peak at 89°F in July, between 86°F in June and 88°F in August, with average lows between 64°F and 68°F. Together the three months average 11.5 inches of precipitation, about 27% of the yearly total. Daylight is at its longest, about 14.6 hours in June.
Fall: September to November
Average highs fall from 81°F in September to 56°F in November, with average lows between 37°F and 58°F. Together the three months average 10 inches of precipitation, about 23% of the yearly total. Snowfall averages about 0.4 inches for the season. Daylight shortens from about 12.2 hours in September to 9.9 in November.
What the National Park Service says about the weather
The weather in Ste. Genevieve is typical of a midwestern climate. High heat and humidity, severe thunderstorms, snow and ice, and extreme cold are all possible depending upon the season. The average high in July is 88 degrees and the average low in January is 22 degrees. The area averages 41 inches of precipitation annually. Please plan your visit accordingly.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Ste. Geneviève
Averages describe a typical month, not this week. For current conditions and the seven-day outlook, the National Weather Service issues a forecast for the park's reference point at 37.98°N, 90.04°W. It covers that one spot, so other elevations in the park can differ from it, as they do from the averages above.
National Weather Service forecast for Ste. Geneviève National Historical Park →
Weather and crowds together
July, the warmest month, sees about 1.2× the visitors of the park's average month. August is the busiest month of the year and January the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Ste. Geneviève National Historical Park. For hotels, cabins and rentals close to the park, see where to stay near Ste. Geneviève.
Where to stay near Ste. Geneviève
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Frequently Asked Questions
July is the warmest month at Ste. Geneviève National Historical Park, with an average high of 89°F and an average low of 68°F. That is the 1991–2020 average at the nearest long-record NOAA station, 5.3 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Ste. Geneviève National Historical Park, with an average low of 24°F and an average high of 40°F, based on NOAA 1991–2020 climate normals.
May is the wettest month, with about 5.2 inches of precipitation. February is the driest, at about 2.4 inches. The station records about 42.8 inches of precipitation in an average year.
Yes. The nearest long-record NOAA station, 5.3 miles from the park's reference point, averages about 4.3 inches of snow a year. February is the snowiest month, at about 1.5 inches. The station averages at least a tenth of an inch of snow in 5 of the 12 months.
Weather at nearby parks
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Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00114629), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (2024–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.