Arkansas · county records since 1895, through September 2026.
Weather › Arkansas › Jefferson County
Jefferson County just had its 2nd-warmest September in 132 years, +8° against the usual. Only 0.17 inches fell in September, the driest September on record there.
That is the 1991 to 2020 average for these dates in Jefferson County. The Weather Service forecast fills in below.
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Each bar is a month's average temperature against the usual for that month (1991 to 2020). Ranks compare the same month in every year since 1895.
Rain and melted snow against the usual for each month. The drought reading is NOAA's Palmer index for the county.
| Month | Usual high / low | Usual rain | Warmest | Coldest |
|---|---|---|---|---|
| January | 52° / 33° | 4.0 in | 50.7° 1907 | 29.3° 1918 |
| February | 56° / 36° | 4.4 in | 54.3° 1976 | 33.4° 1905 |
| March | 65° / 43° | 5.3 in | 64.2° 2012 | 41.8° 1960 |
| April | 74° / 51° | 5.6 in | 70.0° 1896 | 55.4° 1907 |
| May | 81° / 61° | 5.1 in | 76.3° 1896 | 64.5° 1917 |
| June | 89° / 69° | 3.6 in | 84.2° 1953 | 71.6° 1903 |
| July | 92° / 72° | 3.6 in | 85.9° 1930 | 76.4° 2014 |
| August | 91° / 70° | 3.5 in | 86.6° 1954 | 75.4° 1992 |
| September | 86° / 63° | 3.2 in | 82.6° 1925 | 67.2° 1974 |
| October | 75° / 51° | 4.4 in | 69.4° 1941 | 55.7° 1952 |
| November | 63° / 42° | 4.4 in | 59.1° 1909 | 44.3° 1976 |
| December | 54° / 35° | 5.3 in | 55.0° 2021 | 32.3° 1983 |
Warmest and coldest are the month's whole-month average temperature, with the year it happened.
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