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Duncan weather

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Duncan weather alerts and warnings

active National Weather Service watches, warnings and advisories

Checking the National Weather Service for active alerts covering Duncan…

Duncan weather in numbers

from 30 years of measured normals

Duncan swings 68°F across the year, from 100°F highs in August to 32°F lows in January, and April is usually the wettest month in a year that brings about 31 in of precipitation.

Warmest month
August
100°F average high
Coldest month
January
32°F average low
Wettest month
April
31 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
3 months
February, March and November
Residents
23,000
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The weather map: all three models at once

NWS, American, European side by side around Duncan and nearby towns.Live rain radar →
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Duncan hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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Duncan 10-day forecast, out to 14 days

where the models agree, and where they split

Duncan, Oklahoma (OK) is at its warmest in Aug (average highs near 100°F) and coldest in Jan (lows around 32°F), with roughly 31 in of precipitation across the year. Below, compare what NWS, American, European forecast for Duncan right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Duncan climate by month

average daytime high and overnight low across a typical year
Jan
52°
32°
Feb
60°
39°
Mar
66°
46°
Apr
74°
53°
May
82°
63°
Jun
91°
71°
Jul
95°
75°
Aug
100°
78°
Sep
90°
69°
Oct
79°
59°
Nov
64°
46°
Dec
57°
40°

Which forecast is most accurate in the US?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
89
/100rank #1
88±1.2°F96±1.2 mph8491% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
73
/100rank #2
82±1.8°F93±2.3 mph4972% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Common questions

What's the weather in Duncan today?
On this page we show what NWS, American, European each forecast for Duncan today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Duncan today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Duncan and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Duncan?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Duncan forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in Duncan?
August is typically the warmest month in Duncan, with average highs around 100°F.
How cold does Duncan get?
The coldest month in Duncan is January, when overnight lows average about 32°F.
How much rain does Duncan get?
Duncan sees roughly 31 in of precipitation a year, with April usually the wettest month.

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