2025 Compare Climate & Weather:
Sunman, IN vs Duncan, OK

Highlights

On average, there are 241 sunny days per year in Duncan. Sunman averages 181 sunny days per year. The US average is 205 sunny days.

Duncan, Oklahoma gets 36.5 inches of rain, on average, per year. Sunman, Indiana gets 45.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Duncan averages 4.2 inches of snow per year. Sunman averages 15 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Duncan, Oklahoma
Summer High: the July high is around 93.8 degrees
Winter Low: the January low is 27.3
Rain: averages 36.5 inches of rain a year
Snow: averages 4.2 inches of snow a year

Sunman, Indiana
Summer High: the July high is around 84.9 degrees
Winter Low: the January low is 20
Rain: averages 45.3 inches of rain a year
Snow: averages 15 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Duncan is 7.3 (10=best), which means it is more comfortable than most places in Oklahoma.

The annual BestPlaces Comfort Index for Sunman is 7.2 (10=best), which means it is one of the most pleasant places in Indiana.

Today's Weather - Sunman, IN

74°F

Today's Weather - Duncan, OK

92°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Sunman / Duncan

July is the hottest month for Sunman with an average high temperature of 84.9°, which ranks it as warmer than most places in Indiana. In Sunman, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sunman are September, June and May.

August is the hottest month for Duncan with an average high temperature of 94.3°, which ranks it as warmer than most places in Oklahoma. In Duncan, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Duncan are May, October and April.

January has the coldest nighttime temperatures for Sunman with an average of 20.0°. This is warmer than most places in Indiana.

January has the coldest nighttime temperatures for Duncan with an average of 27.3°. This is warmer than most places in Oklahoma.

In Sunman, there are 14.9 days annually when the high temperature is over 90°, which is hotter than most places in Indiana.

In Duncan, there are 71.9 days annually when the high temperature is over 90°, which is hotter than most places in Oklahoma.

In Sunman, there are 117.9 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Indiana.

In Duncan, there are 73.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Oklahoma.

In Sunman, there are 4.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Indiana.

In Duncan, there are 0.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Oklahoma.

May is the wettest month in Sunman with 5.6 inches of rain, and the driest month is February with 2.5 inches. The wettest season is Summer with 31% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 45.3 inches in Sunman means that it is wetter than most places in Indiana.


May is the wettest month in Duncan with 5.0 inches of rain, and the driest month is January with 1.4 inches. The wettest season is Summer with 30% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 36.5 inches in Duncan means that it is drier than most places in Oklahoma.

April is the rainiest month in Sunman with 11.7 days of rain, and September is the driest month with only 6.5 rainy days. There are 106.9 rainy days annually in Sunman, which is one of the least rainy places in Indiana. The rainiest season is Summer when it rains 31% of the time and the driest is Winter with only a 21% chance of a rainy day.

May is the rainiest month in Duncan with 8.8 days of rain, and January is the driest month with only 4.8 rainy days. There are 75.1 rainy days annually in Duncan, which is about average compared to other places in Oklahoma. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 21% chance of a rainy day.

An annual snowfall of 15.0 inches in Sunman means that it is less snowy than most places in Indiana.

An annual snowfall of 4.2 inches in Duncan means that it is less snowy than most places in Oklahoma.

January is the snowiest month in Sunman with 4.8 inches of snow, and 4 months of the year have significant snowfall.

January is the snowiest month in Duncan with 1.6 inches of snow, and 3 months of the year have significant snowfall.