Humid subtropical climate

Climate Duncan - Oklahoma

Annual high73ºF

Annual low50ºF

Precipitation38.01 inch

Month	HighºF	LowºF	Precipinch	Snowinch
Jan	51	28	1.51	2
Feb	56	32	2.03	1
Mar	64	41	2.96	0
Apr	73	49	3.56	0
May	80	59	5.28	0
Jun	88	67	4.96	0
Jul	93	71	2.60	0
Aug	94	71	2.78	0
Sep	85	63	3.64	0
Oct	75	51	4.26	0
Nov	63	40	2.31	0
Dec	52	30	2.12	1

JanHigh 51ºFLow 28ºFPrecip 1.51 inch
FebHigh 56ºFLow 32ºFPrecip 2.03 inch
MarHigh 64ºFLow 41ºFPrecip 2.96 inch
AprHigh 73ºFLow 49ºFPrecip 3.56 inch
MayHigh 80ºFLow 59ºFPrecip 5.28 inch
JunHigh 88ºFLow 67ºFPrecip 4.96 inch
JulHigh 93ºFLow 71ºFPrecip 2.60 inch
AugHigh 94ºFLow 71ºFPrecip 2.78 inch
SepHigh 85ºFLow 63ºFPrecip 3.64 inch
OctHigh 75ºFLow 51ºFPrecip 4.26 inch
NovHigh 63ºFLow 40ºFPrecip 2.31 inch
DecHigh 52ºFLow 30ºFPrecip 2.12 inch

Duncan Climate Graph - Oklahoma Climate Chart

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Climate summary

What is the average weather in Duncan, Oklahoma?

Duncan experiences a humid subtropical climate with a very large seasonal temperature contrast. Summers are hot, while winters are cold and bring occasional snowfall. The area is fairly wet overall, with a strong seasonal pattern that makes spring the wettest time of year. Heavy seasonal downpours or afternoon thunderstorms can sometimes occur during the warmer months.

Based on climate normals · 1991–2020

Duncan weather averages

Annual high73ºF

Annual low50ºF

Precipitation38.01 inch

Snowfall4 inch

Daily normals Duncan - Oklahoma - January

Day	HighºF	LowºF	Prec/moinch	Prec/yrinch	Snow/moinch	Snow/yrinch
Jan 1	51.2	28.8	0.05	0.05	0.00	0.00
Jan 2	51.1	28.7	0.11	0.11	0.10	0.10
Jan 3	51.1	28.7	0.17	0.17	0.10	0.10
Jan 4	51.1	28.6	0.22	0.22	0.10	0.10
Jan 5	51.1	28.6	0.28	0.28	0.20	0.20
Jan 6	51.1	28.5	0.33	0.33	0.20	0.20
Jan 7	51.1	28.5	0.39	0.39	0.20	0.20
Jan 8	51.1	28.4	0.44	0.44	0.30	0.30
Jan 9	51.2	28.4	0.49	0.49	0.30	0.30
Jan 10	51.2	28.3	0.54	0.54	0.30	0.30
Jan 11	51.3	28.3	0.59	0.59	0.40	0.40
Jan 12	51.3	28.3	0.64	0.64	0.40	0.40
Jan 13	51.4	28.3	0.68	0.68	0.40	0.40
Jan 14	51.5	28.2	0.73	0.73	0.40	0.40
Jan 15	51.5	28.2	0.78	0.78	0.50	0.50
Jan 16	51.6	28.2	0.82	0.82	0.50	0.50
Jan 17	51.7	28.2	0.87	0.87	0.50	0.50
Jan 18	51.8	28.2	0.92	0.92	0.60	0.60
Jan 19	51.9	28.2	0.97	0.97	0.60	0.60
Jan 20	52.1	28.2	1.01	1.01	0.60	0.60
Jan 21	52.2	28.2	1.06	1.06	0.70	0.70
Jan 22	52.3	28.2	1.10	1.10	0.70	0.70
Jan 23	52.4	28.3	1.15	1.15	0.80	0.80
Jan 24	52.6	28.3	1.20	1.20	0.80	0.80
Jan 25	52.7	28.3	1.25	1.25	0.80	0.80
Jan 26	52.8	28.4	1.29	1.29	0.90	0.90
Jan 27	53.0	28.4	1.34	1.34	0.90	0.90
Jan 28	53.1	28.5	1.38	1.38	1.00	1.00
Jan 29	53.3	28.6	1.43	1.43	1.00	1.00
Jan 30	53.4	28.7	1.47	1.47	1.10	1.10
Jan 31	53.6	28.8	1.52	1.52	1.10	1.10

Precipitation and snow add up through the month (/mo) and the year (/yr)

Weather history Duncan - July 2025

Day	HighºF	LowºF	Precip.inch
Jul 1	–	–	1.22
Jul 2	–	–	0.00
Jul 3	–	–	0.00
Jul 4	–	–	0.00
Jul 5	–	–	1.02
Jul 6	–	–	0.00
Jul 7	–	–	0.00
Jul 8	–	–	0.00
Jul 9	–	–	0.00
Jul 10	–	–	0.00
Jul 11	–	–	0.00
Jul 12	–	–	0.00
Jul 13	–	–	0.68
Jul 14	–	–	0.00
Jul 15	–	–	0.00
Jul 16	–	–	0.00
Jul 17	–	–	0.00
Jul 18	–	–	0.00
Jul 19	–	–	0.00
Jul 20	–	–	–
Jul 21	–	–	–
Jul 22	–	–	–
Jul 23	–	–	–
Jul 24	–	–	–
Jul 25	–	–	–
Jul 26	–	–	–
Jul 27	–	–	–
Jul 28	–	–	–
Jul 29	–	–	–
Jul 30	–	–	–
Jul 31	–	–	–

The data for July 2025 is incomplete: some days or values are missing.

–No data
–Not yet observed or received
TTrace, too small to measure

Geo Duncan - Oklahoma

34.47°N, 97.96°W

Location

Country: United States
State: Oklahoma
County: Stephens
City: Duncan
Zip Code: 73533
Elevation: 1093 ft
Longitude: -97.96
Latitude: 34.47
ICAO: –
IATA: –

Map of Duncan - Oklahoma

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