Duncan weather in January

In January, Duncan sees average daytime highs of 52°F and overnight lows near 32°F, with 1.5 in of precipitation across 4.8 wet days and about 10 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 52°F through the month. The sky is clear or mostly clear about 49% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of January to 10 h 18 min by month's end. Set against the rest of the year, January is Duncan's 7th-clearest and 8th-windiest month. For the whole year in context, see Duncan's year-round climate.

Daytime high: 52°; 12th warmest
Overnight low: 32°; 1st coldest
Precipitation: 1.5 in; 4.8 wet days
Daylight: 9 h 54 min; 7:43 AM – 5:39 PM
Cloud cover: 46%; 7th clearest
Wind: 8 mph; 8th windiest
Solar energy: 2.95 kWh/m²
Travel score: 3.2; out of 10

Duncan is city and county seat of Stephens County, Oklahoma, United States.

Density: 188/km²; people per km²
Founded: 1892

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← December Duncan year-round climate February →Best places to visit in January

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 52°F through the month.

A typical January day in Duncan reaches about 52°F in the afternoon and slips back to 32°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 36°F and 66°F. Set against its neighbours, January runs on par with December and about 5°F cooler than February.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°F)	51	51	51	51	51	51	51	51	51	51	51	51	51	51	52	52	52	52	52	52	53	53	53	53	53	53	53	53	53	53	53
Avg low (°F)	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	33	33	33	33	33

	Avg high (°F)	Avg low (°F)
1	51	32
2	51	32
3	51	32
4	51	32
5	51	32
6	51	32
7	51	32
8	51	32
9	51	32
10	51	32
11	51	32
12	51	32
13	51	32
14	51	32
15	52	32
16	52	32
17	52	32
18	52	32
19	52	32
20	52	32
21	53	32
22	53	32
23	53	32
24	53	32
25	53	32
26	53	32
27	53	33
28	53	33
29	53	33
30	53	33
31	53	33

How January really feels in Duncan

Once humidity and wind are folded in, January averages 0 days that feel above 90°F and 31 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F

heat index over the day's high

Days feeling ≤ 32°F

wind chill below the day's low

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Duncan weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	52° / 32°	1.5	4.8	0.9	10	3.2
Feb	56° / 36°	1.8	5.8	0.9	10.7	4.4
Mar	65° / 44°	3.1	7.6	0.4	11.7	6.4
Apr	73° / 52°	3.6	7.9	0	12.8	7.3
May	81° / 62°	4.7	10.6	0	13.8	6.3
Jun	89° / 70°	3.6	8.6	0	14.3	4.4
Jul	94° / 74°	1.8	5.8	0	14.1	3.2
Aug	93° / 73°	1.9	5.6	0	13.3	3.4
Sep	85° / 65°	2.8	6.4	0	12.2	5.8
Oct	74° / 54°	3.5	6.8	0	11.1	7.6
Nov	62° / 42°	2.1	5.5	0.2	10.2	6.2
Dec	53° / 34°	2.0	5.2	0.8	9.7	3.5

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 11% of January, with mostly cloudy or overcast conditions the remaining 40%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	59	59	59	59	59	59	59	59	60	60	61	61	60	61	61	61	61	62	61	61	61	61	61	61	61	60	59	59	58	58	57
Cloudier (%)	41	41	41	41	41	41	41	41	40	40	39	39	40	39	39	39	39	38	39	39	39	39	39	39	39	40	41	41	42	42	43

	Clearer (%)	Cloudier (%)
1	59	41
2	59	41
3	59	41
4	59	41
5	59	41
6	59	41
7	59	41
8	59	41
9	60	40
10	60	40
11	61	39
12	61	39
13	60	40
14	61	39
15	61	39
16	61	39
17	61	39
18	62	38
19	61	39
20	61	39
21	61	39
22	61	39
23	61	39
24	61	39
25	61	39
26	60	40
27	59	41
28	59	41
29	58	42
30	58	42
31	57	43

Chance of precipitation in January

Any precipitationSnow

Duncan gets around 1.5 in of rain and snow over 4.8 wet days in January, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 16% and peaks near 18% on the wettest days, and about 1 day brings snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	16	17	17	16	16	16	16	16	16	16	15	15	15	15	15	15	15	15	15	15	15	15	16	16	16	16	17	17	17	18	18
Snow chance (%)	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	4	4	4	4

	Rain chance (%)	Snow chance (%)
1	16	3
2	17	3
3	17	3
4	16	3
5	16	3
6	16	3
7	16	3
8	16	3
9	16	3
10	16	3
11	15	3
12	15	3
13	15	3
14	15	3
15	15	3
16	15	3
17	15	3
18	15	3
19	15	3
20	15	3
21	15	3
22	15	3
23	16	3
24	16	3
25	16	3
26	16	3
27	17	3
28	17	4
29	17	4
30	18	4
31	18	4

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	98	98	98	98	98	98	98	99	99	99	99	100	100	100	100	100	100	100	100	100	100	100	100	100	99	99	99	99	99	99	99
Comfortable (%)	2	2	2	2	2	2	2	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	99	1
9	99	1
10	99	1
11	99	1
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

Wind in January

Winds average 8 mph in January.

Across January, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (mph)	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (mph)	Feels
1	8	light breeze
2	8	light breeze
3	8	light breeze
4	8	light breeze
5	8	light breeze
6	8	light breeze
7	8	light breeze
8	8	light breeze
9	8	light breeze
10	8	light breeze
11	8	light breeze
12	8	light breeze
13	8	light breeze
14	8	light breeze
15	8	light breeze
16	8	light breeze
17	8	light breeze
18	8	light breeze
19	8	light breeze
20	8	light breeze
21	8	light breeze
22	8	light breeze
23	8	light breeze
24	8	light breeze
25	8	light breeze
26	8	light breeze
27	8	light breeze
28	8	light breeze
29	8	light breeze
30	8	light breeze
31	8	light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 42 min at the start of January to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over January. Sunrise moves from 7:43 AM to 7:37 AM, and sunset from 5:27 PM to 5:53 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	9.7	9.7	9.7	9.8	9.8	9.8	9.8	9.8	9.8	9.8	9.8	9.9	9.9	9.9	9.9	9.9	9.9	10.0	10.0	10.0	10.0	10.0	10.1	10.1	10.1	10.1	10.2	10.2	10.2	10.2	10.3
Sunrise (AM)	7:43	7:43	7:44	7:44	7:44	7:44	7:44	7:44	7:44	7:44	7:44	7:44	7:44	7:44	7:43	7:43	7:43	7:43	7:43	7:42	7:42	7:42	7:41	7:41	7:40	7:40	7:39	7:39	7:38	7:38	7:37
Sunset (PM)	5:27	5:28	5:28	5:29	5:30	5:30	5:31	5:32	5:33	5:34	5:35	5:35	5:36	5:37	5:38	5:39	5:40	5:41	5:42	5:43	5:44	5:45	5:45	5:46	5:47	5:48	5:49	5:50	5:51	5:52	5:53

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.7	7:43	5:27
2	9.7	7:43	5:28
3	9.7	7:44	5:28
4	9.8	7:44	5:29
5	9.8	7:44	5:30
6	9.8	7:44	5:30
7	9.8	7:44	5:31
8	9.8	7:44	5:32
9	9.8	7:44	5:33
10	9.8	7:44	5:34
11	9.8	7:44	5:35
12	9.9	7:44	5:35
13	9.9	7:44	5:36
14	9.9	7:44	5:37
15	9.9	7:43	5:38
16	9.9	7:43	5:39
17	9.9	7:43	5:40
18	10.0	7:43	5:41
19	10.0	7:43	5:42
20	10.0	7:42	5:43
21	10.0	7:42	5:44
22	10.0	7:42	5:45
23	10.1	7:41	5:45
24	10.1	7:41	5:46
25	10.1	7:40	5:47
26	10.1	7:40	5:48
27	10.2	7:39	5:49
28	10.2	7:39	5:50
29	10.2	7:38	5:51
30	10.2	7:38	5:52
31	10.3	7:37	5:53

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.95 kWh/m².

For context, solar energy here swings from a low near 2.59 kWh/m² to a high of 6.94 kWh/m² in July across the year — January's 2.95 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	2.7	2.7	2.7	2.7	2.7	2.7	2.8	2.8	2.8	2.8	2.8	2.9	2.9	2.9	2.9	3.0	3.0	3.0	3.0	3.1	3.1	3.1	3.1	3.2	3.2	3.2	3.2	3.3	3.3	3.3	3.3
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.7	Moderate
2	2.7	Moderate
3	2.7	Moderate
4	2.7	Moderate
5	2.7	Moderate
6	2.7	Moderate
7	2.8	Moderate
8	2.8	Moderate
9	2.8	Moderate
10	2.8	Moderate
11	2.8	Moderate
12	2.9	Moderate
13	2.9	Moderate
14	2.9	Moderate
15	2.9	Moderate
16	3.0	Moderate
17	3.0	Moderate
18	3.0	Moderate
19	3.0	Moderate
20	3.1	Moderate
21	3.1	Moderate
22	3.1	Moderate
23	3.1	Moderate
24	3.2	Moderate
25	3.2	Moderate
26	3.2	Moderate
27	3.2	Moderate
28	3.3	Moderate
29	3.3	Moderate
30	3.3	Moderate
31	3.3	Moderate

Planning a trip in January

Is January a good time to visit Duncan?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.2

Sightseeing

11th-best month of the year

0.0

Beach & pool

12th-best month of the year

January is a weaker month for outdoor sightseeing in Duncan.

What to pack for Duncan in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Duncan sees daytime highs around 52°F and nights near 32°F. Pack a warm layer. About 5 days see rain.

a warm layer

UV index in Duncan in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Duncan peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	3	5	6	9	9	10	10	10	7	6	4	3
Level	Moderate	Moderate	High	Very high	Very high	Extreme	Extreme	Very high	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	3	Moderate
Feb	5	Moderate
Mar	6	High
Apr	9	Very high
May	9	Very high
Jun	10	Extreme
Jul	10	Extreme
Aug	10	Very high
Sep	7	Very high
Oct	6	High
Nov	4	Moderate
Dec	3	Moderate

Location & terrain

Where is Duncan?

Duncan sits at 34.5°N, 98.0°W, 1,122 ft above sea level, in United States. The nearest listed city is Lawton, 25 mi away.

Topography around Duncan

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Duncan.

Within 2 miles, the terrain around Duncan has only modest variations in elevation — a maximum elevation change of 167 ft around an average of 1,125 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 367 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,716 ft.

The land around Duncan is covered by grassland (39%), trees (29%) and artificial surfaces (27%) within 2 miles, grassland (64%) and trees (25%) within 10 miles, and grassland (66%) within 50 miles.

2 miles

167 ft

grassland 39%

10 miles

367 ft

grassland 64%

50 miles

1,716 ft

grassland 66%

treesgrasslandcroplandartificial surfacesbare terrainwater

← December Duncan year-round climate February →Best places to visit in January

January weather nearby: Lawton 25 mi · Chickasha 38 mi · Wichita Falls 51 mi · Ardmore 52 mi · Norman 58 mi · Mustang 62 mi · Moore 64 mi · Yukon 70 mi

United States travel facts

Power plugs: Type A / B; 120 V · 60 Hz
Prices: ≈ 100% of US; price level, 2025
GDP per capita: $90,027; 2025
Happiness: 6.8 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 5.8; per 100k, 2023
Road deaths: 12.7; per 100k/yr, 2019
Income group: High; World Bank
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Duncan (34.5023°, -97.9578°, elevation 1,122 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°F)	Avg low (°F)
1	51	32
2	51	32
3	51	32
4	51	32
5	51	32
6	51	32
7	51	32
8	51	32
9	51	32
10	51	32
11	51	32
12	51	32
13	51	32
14	51	32
15	52	32
16	52	32
17	52	32
18	52	32
19	52	32
20	52	32
21	53	32
22	53	32
23	53	32
24	53	32
25	53	32
26	53	32
27	53	33
28	53	33
29	53	33
30	53	33
31	53	33

	Clearer (%)	Cloudier (%)
1	59	41
2	59	41
3	59	41
4	59	41
5	59	41
6	59	41
7	59	41
8	59	41
9	60	40
10	60	40
11	61	39
12	61	39
13	60	40
14	61	39
15	61	39
16	61	39
17	61	39
18	62	38
19	61	39
20	61	39
21	61	39
22	61	39
23	61	39
24	61	39
25	61	39
26	60	40
27	59	41
28	59	41
29	58	42
30	58	42
31	57	43

	Rain chance (%)	Snow chance (%)
1	16	3
2	17	3
3	17	3
4	16	3
5	16	3
6	16	3
7	16	3
8	16	3
9	16	3
10	16	3
11	15	3
12	15	3
13	15	3
14	15	3
15	15	3
16	15	3
17	15	3
18	15	3
19	15	3
20	15	3
21	15	3
22	15	3
23	16	3
24	16	3
25	16	3
26	16	3
27	17	3
28	17	4
29	17	4
30	18	4
31	18	4

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	99	1
9	99	1
10	99	1
11	99	1
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

	Avg high (°F)	Avg low (°F)
1	51	32
2	51	32
3	51	32
4	51	32
5	51	32
6	51	32
7	51	32
8	51	32
9	51	32
10	51	32
11	51	32
12	51	32
13	51	32
14	51	32
15	52	32
16	52	32
17	52	32
18	52	32
19	52	32
20	52	32
21	53	32
22	53	32
23	53	32
24	53	32
25	53	32
26	53	32
27	53	33
28	53	33
29	53	33
30	53	33
31	53	33

	Clearer (%)	Cloudier (%)
1	59	41
2	59	41
3	59	41
4	59	41
5	59	41
6	59	41
7	59	41
8	59	41
9	60	40
10	60	40
11	61	39
12	61	39
13	60	40
14	61	39
15	61	39
16	61	39
17	61	39
18	62	38
19	61	39
20	61	39
21	61	39
22	61	39
23	61	39
24	61	39
25	61	39
26	60	40
27	59	41
28	59	41
29	58	42
30	58	42
31	57	43

	Rain chance (%)	Snow chance (%)
1	16	3
2	17	3
3	17	3
4	16	3
5	16	3
6	16	3
7	16	3
8	16	3
9	16	3
10	16	3
11	15	3
12	15	3
13	15	3
14	15	3
15	15	3
16	15	3
17	15	3
18	15	3
19	15	3
20	15	3
21	15	3
22	15	3
23	16	3
24	16	3
25	16	3
26	16	3
27	17	3
28	17	4
29	17	4
30	18	4
31	18	4

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	99	1
9	99	1
10	99	1
11	99	1
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

	Avg high (°F)	Avg low (°F)
1	51	32
2	51	32
3	51	32
4	51	32
5	51	32
6	51	32
7	51	32
8	51	32
9	51	32
10	51	32
11	51	32
12	51	32
13	51	32
14	51	32
15	52	32
16	52	32
17	52	32
18	52	32
19	52	32
20	52	32
21	53	32
22	53	32
23	53	32
24	53	32
25	53	32
26	53	32
27	53	33
28	53	33
29	53	33
30	53	33
31	53	33

	Clearer (%)	Cloudier (%)
1	59	41
2	59	41
3	59	41
4	59	41
5	59	41
6	59	41
7	59	41
8	59	41
9	60	40
10	60	40
11	61	39
12	61	39
13	60	40
14	61	39
15	61	39
16	61	39
17	61	39
18	62	38
19	61	39
20	61	39
21	61	39
22	61	39
23	61	39
24	61	39
25	61	39
26	60	40
27	59	41
28	59	41
29	58	42
30	58	42
31	57	43

	Rain chance (%)	Snow chance (%)
1	16	3
2	17	3
3	17	3
4	16	3
5	16	3
6	16	3
7	16	3
8	16	3
9	16	3
10	16	3
11	15	3
12	15	3
13	15	3
14	15	3
15	15	3
16	15	3
17	15	3
18	15	3
19	15	3
20	15	3
21	15	3
22	15	3
23	16	3
24	16	3
25	16	3
26	16	3
27	17	3
28	17	4
29	17	4
30	18	4
31	18	4

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	99	1
9	99	1
10	99	1
11	99	1
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1