Updated October 2026
Ocmulgee Mounds National Historical Park Weather by Month
Ocmulgee Mounds National Historical Park is warmest in July, when the nearest NOAA climate station averages a high of 94°F and a low of 72°F, and coldest in January, with an average high of 59°F and an average low of 36°F. July is the wettest month, with about 4.8 inches of precipitation.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 10.7 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Ocmulgee Mounds National Historical Park can differ from these, particularly with elevation.
Warmest month
Jul
94°F avg high
Coldest month
Jan
36°F avg low
Wettest month
Jul
4.8 in avg
Longest days
Jun
14.2 h of daylight
Average weather at Ocmulgee Mounds by month
| Month | Avg high | Avg low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 59°F | 36°F | 4.3 in | 10.1 h |
| February | 63°F | 39°F | 4.2 in | 10.8 h |
| March | 71°F | 45°F | 4.3 in | 11.8 h |
| April | 78°F | 51°F | 3.6 in | 12.8 h |
| May | 86°F | 60°F | 2.7 in | 13.7 h |
| June | 91°F | 68°F | 4.4 in | 14.2 h |
| July | 94°F | 72°F | 4.8 in | 14.0 h |
| August | 92°F | 71°F | 4.4 in | 13.2 h |
| September | 88°F | 65°F | 3.7 in | 12.2 h |
| October | 79°F | 53°F | 2.6 in | 11.2 h |
| November | 69°F | 43°F | 3.4 in | 10.3 h |
| December | 61°F | 38°F | 4.6 in | 9.8 h |
| Year total | 47.0 in |
NOAA 1991–2020 climate normals from station USW00003813, 10.7 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Ocmulgee Mounds is at that time of year.
Ocmulgee Mounds weather by season
Winter: December to February
Average highs bottom out at 59°F in January, between 61°F in December and 63°F in February, with average lows between 36°F and 39°F. Together the three months average 13.1 inches of precipitation, about 28% of the yearly total. Daylight is at its shortest, about 9.8 hours in December.
Spring: March to May
Average highs climb from 71°F in March to 86°F in May, with average lows between 45°F and 60°F. Together the three months average 10.6 inches of precipitation, about 23% of the yearly total. Daylight lengthens from about 11.8 hours in March to 13.7 in May.
Summer: June to August
Average highs peak at 94°F in July, between 91°F in June and 92°F in August, with average lows between 68°F and 72°F. The average high is 90°F or hotter in all three months. Together the three months average 13.6 inches of precipitation, about 29% of the yearly total and more than in any other season. Daylight is at its longest, about 14.2 hours in June.
Fall: September to November
Average highs fall from 88°F in September to 69°F in November, with average lows between 43°F and 65°F. Together the three months average 9.7 inches of precipitation, about 21% of the yearly total and less than in any other season. Daylight shortens from about 12.2 hours in September to 10.3 in November.
What the National Park Service says about the weather
Macon has a humid subtropical climate (Köppen climate classification Cfa). The average high temperature ranges from 46 to 58°F (7.7 to 14.4°C) in January and 82 to 91°F (27.7 to 32.7°C) in July. Winters are mild. Temps ranging from 30 degrees to 50 degrees. Spring is mild but wet. Temps ranging from 50 degrees to low 70 degrees. Summers are hot and very humid. Temp ranging from upper 80 degrees to 100 degrees. Fall is pleasant. Temps ranging from 60 to 80 degrees.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Ocmulgee Mounds
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 32.84°N, 83.60°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 Ocmulgee Mounds National Historical Park →
Weather and crowds together
July, the warmest month, sees about 0.9× the visitors of the park's average month. September 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 Ocmulgee Mounds National Historical Park. For hotels, cabins and rentals close to the park, see where to stay near Ocmulgee Mounds.
Where to stay near Ocmulgee Mounds
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Frequently Asked Questions
July is the warmest month at Ocmulgee Mounds National Historical Park, with an average high of 94°F and an average low of 72°F. That is the 1991–2020 average at the nearest long-record NOAA station, 10.7 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Ocmulgee Mounds National Historical Park, with an average low of 36°F and an average high of 59°F, based on NOAA 1991–2020 climate normals.
July is the wettest month, with about 4.8 inches of precipitation. October is the driest, at about 2.6 inches. The station records about 47 inches of precipitation in an average year.
Daylight at Ocmulgee Mounds National Historical Park runs from about 9.8 hours a day in December to about 14.2 hours in June, computed from the park's latitude.
Weather at nearby parks
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Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USW00003813), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (1979–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.