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Decatur March Weather

Averages and records for weather in Decatur, Illinois in the month of March.

Typical Decatur March Weather 1991–2020
Average daily high	52.3 °F
Average daily low	32.8 °F
Average monthly precipitation	2.6 inches
Average monthly snow	1.1 inches
Daily chance of precipitation	32.0%
Daily chance of snow	2.4%

Decatur March Weather Records 1893–2024
Highest temperature	89 °F	March 24, 1929
Lowest temperature	-10 °F	March 5, 1978
Highest daily low	64 °F	March 21, 2012
Lowest daily high	13 °F	March 4, 2019
Hottest average high temperature	65.9 °F	2012
Coldest average high temperature	36.9 °F	1960
Most daily precipitation	4.3 inches	March 27, 1898
Most monthly precipitation	9.8 inches	1898
Most daily snow	13.5 inches	March 19, 1906
Most monthly snow	30.5 inches	1906

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
March 1	46.2	27.8	72	-2
March 2	46.8	28.1	78	-4
March 3	47.3	28.6	79	0
March 4	47.7	28.9	79	-3
March 5	48.0	29.2	76	-10
March 6	48.4	29.5	79	-5
March 7	48.7	29.8	79	-2
March 8	49.0	30.0	79	-2
March 9	49.4	30.3	78	2
March 10	49.8	30.5	79	0
March 11	50.1	30.9	79	6
March 12	50.5	31.2	80	-3
March 13	51.0	31.5	82	4
March 14	51.5	31.9	78	7
March 15	51.8	32.3	79	14
March 16	52.3	32.7	84	3
March 17	52.8	33.1	82	-1
March 18	53.4	33.5	78	5
March 19	54.0	34.0	83	1
March 20	54.6	34.4	83	6
March 21	55.0	34.7	82	12
March 22	55.3	34.9	88	10
March 23	55.7	35.3	84	13
March 24	56.2	35.6	89	6
March 25	56.7	36.0	85	9
March 26	57.1	36.4	83	5
March 27	57.5	36.7	82	14
March 28	58.1	37.1	86	14
March 29	58.3	37.4	85	16
March 30	58.7	37.7	85	16
March 31	59.1	38.1	85	12

Weather Station Details

Years	Station	Coordinates
1893–2024	Decatur WTP	location