Casper, WY: April

30 April 2026: April 2026 averaged 44.1°F in Casper, WY, the warmest April since 2012, 29th warmest of 87.

April 2026

Mean temperature: 44.1°F; Warmest since 2012; 29th warmest of 87
Precipitation: 1.28 in; Wettest since 2025; 41st wettest of 87

A normal April in Casper, WY (1991 to 2020): a mean temperature of 42.9°F, between 39.1°F and 46.6°F in eight years of ten and 1.28 in of precipitation, between 0.89 in and 2.23 in in eight years of ten.

The mean temperature of every April in Casper, WY since 1940: 44.1°F in 2026; the highest is 50.4°F, in 1946.

Normal range, 39.1 to 46.6°F

Every year, ranked, as a table

Every April in Casper, WY from 1940 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank
2026	44.1	29	59.3	21	28.8	48	1.28	41
2025	41.4	54	57.4	36	25.4	79	1.59	25
2024	43.6	35	58.5	25	28.7	50	1.22	50
2023	39.3	71	51.7	72	26.9	69	1.49	33
2022	37.6	83	52.2	67	23.1	86	1.98	17
2021	40.8	62	55	53	26.7	71	0.87	74
2020	39	74	54.7	55	23.4	84	1.28	41
2019	43.6	35	56.6	42	30.6	25	1.28	41
2018	41.9	53	58.7	23	25.1	81	1.03	61
2017	43	39	56	47	29.9	35	2.21	12
2016	43	39	55.6	51	30.3	32	3.63	4
2015	43.7	33	58.2	27	29.3	43	1.66	23
2014	42.7	45	57	38	28.5	54	1.15	54
2013	36.3	84	49.2	82	23.4	84	2.54	7
2012	47.1	7	63.6	4	30.6	25	1.01	63
2011	41.3	56	54.3	58	28.4	56	1.37	37
2010	41.2	57	54.7	55	27.7	63	1.11	55
2009	39.9	68	52.1	68	27.8	62	2.05	15
2008	39.7	69	55.7	50	23.6	83	1.27	44
2007	43	39	56.6	42	29.3	43	0.37	82
2006	46.6	14	62.6	8	30.6	25	1.03	61
2005	42.4	48	57	38	27.7	63	1.04	60
2004	44	30	57.6	34	30.4	30	1.17	53
2003	45.5	18	59.6	20	31.4	18	1.54	29
2002	42.8	44	57.8	32	27.7	63	0.77	76
2001	44.9	21	58.4	26	31.5	17	1.07	56
2000	44.4	24	60	17	28.7	50	1.18	51
1999	39.1	72	50.1	77	28.1	58	1.53	30
1998	42.6	46	56.3	46	29	46	1.00	64
1997	34.9	86	47.7	85	22.1	87	1.79	21
1996	43.2	38	56.8	40	29.7	37	1.72	22
1995	40.4	65	52.8	65	28	60	1.66	23
1994	46.7	10	61.4	10	32.1	13	0.90	72
1993	43.9	32	55.8	49	32	14	2.37	9
1992	49	4	65.2	2	32.7	10	0.08	87
1991	42	51	53.8	59	30.2	33	1.42	36
1990	44.3	26	57.9	30	30.6	25	1.35	38
1989	44.9	21	60.8	13	29	46	0.72	78
1988	45.9	16	62.7	6	29.2	45	0.71	80
1987	49.7	3	65.3	1	34.1	4	0.35	83
1986	44.4	24	58	29	30.7	23	1.89	20
1985	45.5	18	60.6	14	30.4	30	1.25	46
1984	39.1	72	51.8	70	26.4	75	2.23	11
1983	38	80	49.3	81	26.7	71	2.28	10
1982	41.1	58	55.4	52	26.8	70	1.25	46
1981	48.3	5	62.7	6	33.9	6	1.56	27
1980	44.2	27	58.7	23	29.7	37	0.35	83
1979	43.7	33	57.9	30	29.4	42	0.83	75
1978	44.6	23	57.8	32	31.4	18	1.05	59
1977	46.5	15	59.8	18	33.2	8	1.07	56
1976	44	30	56.7	41	31.3	20	1.52	31
1975	37.7	82	48.7	84	26.7	71	0.97	66
1974	43	39	54.5	57	31.6	16	3.92	2
1973	36.1	85	46.5	86	25.6	77	3.86	3
1972	43	39	56.4	45	29.6	39	1.44	34
1971	40.9	60	53.8	59	28	60	3.40	5
1970	38.2	79	48.8	83	27.5	68	1.57	26
1969	46.7	10	60.5	16	32.9	9	1.52	31
1968	38.3	78	50.7	75	26	76	1.18	51
1967	42.6	46	57.6	34	27.7	63	1.24	49
1966	38.9	75	52.3	66	25.5	78	1.29	40
1965	45.8	17	57.4	36	34.1	4	0.96	67
1964	39.7	69	50.8	74	28.6	52	3.09	6
1963	42.3	49	54.8	54	29.9	35	2.07	14
1962	46.7	10	61.3	11	32	14	0.93	71
1961	41	59	53.4	62	28.6	52	0.95	69
1960	44.2	27	58.8	22	29.6	39	1.06	58
1959	42	51	55.9	48	28.1	58	0.74	77
1958	40.2	66	51.7	72	28.8	48	1.95	18
1957	38.7	76	49.7	79	27.7	63	2.45	8
1956	40.7	63	52.9	64	28.5	54	1.56	27
1955	43.3	37	56.5	44	30	34	1.44	34
1954	46.9	9	61.1	12	32.6	11	0.30	85
1953	38.4	77	50.1	77	26.7	71	0.94	70
1952	47.1	7	60.6	14	33.6	7	0.20	86
1951	37.9	81	50.4	76	25.4	79	1.31	39
1950	40.7	63	53.1	63	28.2	57	2.16	13
1949	46.7	10	62.2	9	31.1	21	0.88	73
1948	45.2	20	58.1	28	32.2	12	1.25	46
1947	40.9	60	52.1	68	29.6	39	2.05	15
1946	50.4	1	64.7	3	36.1	2	0.72	78
1945	34.9	86	45.5	87	24.3	82	1.26	45
1944	41.4	54	51.8	70	31	22	0.58	81
1943	50.1	2	63.2	5	37	1	1.00	64
1942	47.7	6	59.8	18	35.5	3	0.96	67
1941	40	67	49.4	80	30.6	25	5.75	1
1940	42.2	50	53.7	61	30.7	23	1.90	19

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1946	50.4
1943	50.1
1987	49.7
1992	49
1981	48.3
1942	47.7
2012	47.1
1952	47.1
1954	46.9
1994	46.7
More years share the last value

Coldest
Year	Mean, °F
1997	34.9
1945	34.9
1973	36.1
2013	36.3
2022	37.6
1975	37.7
1951	37.9
1983	38
1970	38.2
1968	38.3

Wettest
Year	Precipitation, in
1941	5.75
1974	3.92
1973	3.86
2016	3.63
1971	3.40
1964	3.09
2013	2.54
1957	2.45
1993	2.37
1983	2.28

Driest
Year	Precipitation, in
1992	0.08
1952	0.20
1954	0.30
1987	0.35
1980	0.35
2007	0.37
1944	0.58
1988	0.71
1989	0.72
1946	0.72

The hottest, coldest and wettest days

Hottest day: 81°F; 21 April 2026
Coldest night: 20°F; 5 April 2026
Wettest day: 0.44 in; 16 April 2026

Every month, season and year

Months

Seasons

Years

Casper, WY the day's answers

All-time records

Every answer in words

April 2026 brought 1.28 in of precipitation in Casper, WY, the wettest April since 2025, tied 41st wettest of 87 (with 2020 and 2019).
The hottest day of April 2026 in Casper, WY: 81°F on Tuesday 21 April 2026.
The coldest night of April 2026 in Casper, WY: a low of 20°F on Sunday 5 April 2026.
The wettest day of April 2026 in Casper, WY: 0.44 in on Thursday 16 April 2026.