Updated October 2026
Emmett Till and Mamie Till-Mobley National Monument Weather by Month
Emmett Till and Mamie Till-Mobley National Monument is warmest in July, when the nearest NOAA climate station averages a high of 92°F and a low of 71°F, and coldest in January, with an average high of 50°F and an average low of 32°F. April and December are the wettest months, with about 6.1 inches of precipitation each.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 16.7 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Emmett Till and Mamie Till-Mobley National Monument can differ from these, particularly with elevation.
Warmest month
Jul
92°F avg high
Coldest month
Jan
32°F avg low
Longest days
Jun
14.3 h of daylight
Average weather at Emmett Till and Mamie Till-Mobley by month
| Month | Avg high | Avg low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 50°F | 32°F | 5.1 in | 10.0 h |
| February | 55°F | 35°F | 5.7 in | 10.8 h |
| March | 64°F | 43°F | 5.5 in | 11.7 h |
| April | 74°F | 51°F | 6.1 in | 12.9 h |
| May | 82°F | 61°F | 5.9 in | 13.8 h |
| June | 90°F | 69°F | 4.2 in | 14.3 h |
| July | 92°F | 71°F | 3.0 in | 14.1 h |
| August | 92°F | 71°F | 3.3 in | 13.3 h |
| September | 87°F | 64°F | 3.1 in | 12.2 h |
| October | 76°F | 51°F | 4.2 in | 11.1 h |
| November | 64°F | 41°F | 4.5 in | 10.2 h |
| December | 53°F | 35°F | 6.1 in | 9.7 h |
| Year total | 56.7 in |
NOAA 1991–2020 climate normals from station USC00224869, 16.7 miles from the park's reference point. Snowfall at the station totals about 0.4 inches in an average year. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Emmett Till and Mamie Till-Mobley is at that time of year.
Emmett Till and Mamie Till-Mobley weather by season
Winter: December to February
Average highs bottom out at 50°F in January, between 53°F in December and 55°F in February, with average lows between 32°F and 35°F. The average low is at or below freezing in January. Together the three months average 16.9 inches of precipitation, about 30% of the yearly total. Daylight is at its shortest, about 9.7 hours in December.
Spring: March to May
Average highs climb from 64°F in March to 82°F in May, with average lows between 43°F and 61°F. Together the three months average 17.5 inches of precipitation, about 31% of the yearly total and more than in any other season. Daylight lengthens from about 11.7 hours in March to 13.8 in May.
Summer: June to August
Average highs hold near 91°F in all three months, with average lows near 70°F. The average high is 90°F or hotter in all three months. Together the three months average 10.5 inches of precipitation, about 19% of the yearly total and less than in any other season. Daylight is at its longest, about 14.3 hours in June.
Fall: September to November
Average highs fall from 87°F in September to 64°F in November, with average lows between 41°F and 64°F. Together the three months average 11.8 inches of precipitation, about 21% of the yearly total. Daylight shortens from about 12.2 hours in September to 10.2 in November.
What the National Park Service says about the weather
The Emmett Till and Mamie Till-Mobley National Monument has sites in Chicago, IL and Sumner and Glendora, MS. Check local weather conditions in each unit before you visit.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Emmett Till and Mamie Till-Mobley
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 33.97°N, 90.37°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 Emmett Till and Mamie Till-Mobley National Monument →
Weather and crowds together
July, the warmest month, sees about 1.8× the visitors of the park's average month. June 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 Emmett Till and Mamie Till-Mobley National Monument. For hotels, cabins and rentals close to the park, see where to stay near Emmett Till and Mamie Till-Mobley.
Where to stay near Emmett Till and Mamie Till-Mobley
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Frequently Asked Questions
July is the warmest month at Emmett Till and Mamie Till-Mobley National Monument, with an average high of 92°F and an average low of 71°F. That is the 1991–2020 average at the nearest long-record NOAA station, 16.7 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Emmett Till and Mamie Till-Mobley National Monument, with an average low of 32°F and an average high of 50°F, based on NOAA 1991–2020 climate normals.
April and December are the wettest months, with about 6.1 inches of precipitation each. July is the driest, at about 3 inches. The station records about 56.7 inches of precipitation in an average year.
Rarely, by the station's record. The nearest long-record NOAA station, 16.7 miles from the park's reference point, totals about 0.4 inches of snow in an average year.
Weather at nearby parks
54 mi away · warmest in July (90°F)
78 mi away · warmest in August (91°F)
95 mi away · warmest in August (90°F)
101 mi away · warmest in July (89°F)
113 mi away · warmest in August (92°F)
115 mi away · warmest in August (92°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00224869), 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.