Climate and monthly weather forecastSumner, OK
Climate and monthly weather forecast
Weather in January
January, like December, is another chilly winter month in Sumner, Oklahoma, with an average temperature fluctuating between 30.2°F (-1°C) and 46.9°F (8.3°C). With average high temperatures of 46.9°F (8.3°C) and lows of 30.2°F (-1°C), January is the coldest month. Weather in January »Weather in February
The last month of the winter, February, is a fresh month in Sumner, Oklahoma, with temperature in the range of an average high of 50.2°F (10.1°C) and an average low of 33.1°F (0.6°C). February's arrival brings an average high-temperature of a cool 50.2°F (10.1°C), slightly deviating from January's 46.9°F (8.3°C). Weather in February »Weather in March
March, the first month of the spring in Sumner, is a comfortable month, with temperature in the range of an average low of 43°F (6.1°C) and an average high of 61.7°F (16.5°C). A shift in the average high-temperature is noticeable in March, changing from a fresh 50.2°F (10.1°C) in February to a refreshing 61.7°F (16.5°C). Weather in March »Weather in April
April is an agreeable spring month in Sumner, Oklahoma, with an average temperature ranging between max 69.4°F (20.8°C) and min 50°F (10°C). Entering April, Sumner notices a subtle temperature elevation, with the average high-temperature advancing from March's refreshing 61.7°F (16.5°C) to a pleasant 69.4°F (20.8°C). Weather in April »Weather in May
The last month of the spring, May, is a moderately hot month in Sumner, Oklahoma, with temperature in the range of an average low of 59.2°F (15.1°C) and an average high of 77.5°F (25.3°C). Sumner observes a slight uplift in the average high-temperature with the onset of May, adjusting from April's agreeable 69.4°F (20.8°C) to a warm 77.5°F (25.3°C). Weather in May »Weather in June
June, the first month of the summer in Sumner, is a hot month, with an average temperature varying between 89.2°F (31.8°C) and 70°F (21.1°C). The shift into June brings an increase in the average high-temperature, moving from a warm 77.5°F (25.3°C) in May to a tropical 89.2°F (31.8°C). Weather in June »Weather in July
July, the same as June, in Sumner, Oklahoma, is another tropical summer month, with an average temperature ranging between min 73.4°F (23°C) and max 93.9°F (34.4°C). July, known for its average high temperature of 93.9°F (34.4°C) and an average low temperature of 73.4°F (23°C), is the warmest month. Throughout July, the heat index is evaluated at a scorching 111.2°F (44°C). Weather in July »Weather in August
The last month of the summer, August, is another tropical month in Sumner, Oklahoma, with an average temperature fluctuating between 71.2°F (21.8°C) and 92.8°F (33.8°C). Sumner's shift from July to August is accompanied by an average high-temperature of a still hot 92.8°F (33.8°C), a slight deviation from 93.9°F (34.4°C). Weather in August »Weather in September
September, the first month of the autumn in Sumner, is still a warm month, with an average temperature ranging between max 84.4°F (29.1°C) and min 64.9°F (18.3°C). The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a hot 92.8°F (33.8°C) in August to a warm 84.4°F (29.1°C). Weather in September »Weather in October
October, like September, is an agreeable autumn month in Sumner, Oklahoma, with an average temperature varying between 52.7°F (11.5°C) and 70.7°F (21.5°C). Sumner's October weather shows a moderate shift in high-temperatures, falling from September's moderately hot 84.4°F (29.1°C) to an agreeable 70.7°F (21.5°C). Weather in October »Weather in November
November, the last month of the autumn in Sumner, is also a moderate month, with an average temperature fluctuating between 59.4°F (15.2°C) and 41.4°F (5.2°C). November suggests a modest reduction in the average high-temperature, shifting from a pleasant 70.7°F (21.5°C) in October to a moderate 59.4°F (15.2°C). Weather in November »Weather in December
The first month of the winter, December, is still a chilly month in Sumner, Oklahoma, with an average temperature ranging between max 48.2°F (9°C) and min 32.5°F (0.3°C). The shift from November to December corresponds with a decrease in the average high-temperature, down to a chilly 48.2°F (9°C) from a mild 59.4°F (15.2°C). Weather in December »Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Sumner, the lowest temperatures are generally noted in January, averaging a high of 46.9°F (8.3°C) and a low of 30.2°F (-1°C).
Throughout the year, there are 119.3 rainfall days, and 23.27" (591mm) of precipitation is accumulated.
Months with snowfall in Sumner are January through March, November and December.
Throughout the year, there are 7.8 snowfall days, and 2.99" (76mm) of snow is accumulated.
The month with the most snowfall is February, when snow falls for 2.8 days and typically aggregates up to 1.38" (35mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
In Sumner, snow does not fall in April through October.
May is the most humid month, with an average relative humidity of 74%.
The month with the most rainfall is May, when the rain falls for 14.5 days and typically aggregates up to 4.21" (107mm) of precipitation.
The month with the longest days is June, with an average of 14h and 36min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 7.
July is the month that records the highest temperatures, with averages ranging from a high of 93.9°F (34.4°C) to a low of 73.4°F (23°C).
August is the least humid month, with an average relative humidity of 61%.
The month with the most sunshine is August, with an average of 11.3h of sunshine.
December is the month with the least rainfall. Rain falls for 5.5 days and accumulates 0.83" (21mm) of precipitation.
With an average of 9h and 42min of daylight, December has the shortest days of the year.
With an average of 6.1h of sunshine, December has the least sunshine of the year.
December is the month with the lowest UV index, with an average maximum UV index of 2.
Average temperature
Sumner, OK
The warmest month (with the highest average high temperature) is July (93.9°F).
The month with the lowest average high temperature is January (46.9°F).
The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure
Sumner, OK
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.9"Hg - Average pressure in May:
29.9"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed
Sumner, OK
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.6mph - Average wind speed in March:
11.4mph - Average wind speed in April:
11.6mph - Average wind speed in May:
10mph - Average wind speed in June:
9.9mph
- Average wind speed in July:
8.6mph - Average wind speed in August:
8.3mph - Average wind speed in September:
8.7mph - Average wind speed in October:
9.8mph - Average wind speed in November:
10.6mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity
Sumner, OK
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (61%).
Average rainfall
Sumner, OK
- Average rainfall in January:
0.94" - Average rainfall in February:
1.02" - Average rainfall in March:
1.57" - Average rainfall in April:
2.64" - Average rainfall in May:
4.21" - Average rainfall in June:
1.77"
- Average rainfall in July:
1.89" - Average rainfall in August:
2.32" - Average rainfall in September:
2.52" - Average rainfall in October:
2.68" - Average rainfall in November:
0.87" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is December (0.83").
Average rainfall days
Sumner, OK
- Average rainfall days in January:
4.2 days - Average rainfall days in February:
6.2 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
14.5 days - Average rainfall days in June:
10.8 days
- Average rainfall days in July:
12.5 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
12.1 days - Average rainfall days in October:
10.2 days - Average rainfall days in November:
6.4 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is May (14.5 days).
The month with the least rainy days is January (4.2 days).
Average snowfall
Sumner, OK
The month with the highest snowfall is February (1.38").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Sumner, OK
- Average snowfall days in January:
2.2 days - Average snowfall days in February:
2.8 days - Average snowfall days in March:
0.8 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
1.4 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Sumner, OK
- Average daylight in January:
10h and 0min - Average daylight in February:
10h and 54min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 6min - Average daylight in June:
14h and 36min
- Average daylight in July:
14h and 18min - Average daylight in August:
13h and 30min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 12min - Average daylight in December:
9h and 42min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
6h and 18min - Average sunshine in February:
7h and 18min - Average sunshine in March:
7h and 24min - Average sunshine in April:
8h and 42min - Average sunshine in May:
9h and 18min - Average sunshine in June:
11h and 12min
- Average sunshine in July:
11h and 12min - Average sunshine in August:
11h and 18min - Average sunshine in September:
8h and 42min - Average sunshine in October:
6h and 54min - Average sunshine in November:
6h and 18min - Average sunshine in December:
6h and 6min
The month with the most sunshine is August (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days
Sumner, OK
- Average sunshine days in January:
23.3 days - Average sunshine days in February:
19.3 days - Average sunshine days in March:
17.6 days - Average sunshine days in April:
15 days - Average sunshine days in May:
13.9 days - Average sunshine days in June:
16.7 days
- Average sunshine days in July:
16.3 days - Average sunshine days in August:
14.8 days - Average sunshine days in September:
15.6 days - Average sunshine days in October:
18.8 days - Average sunshine days in November:
21.7 days - Average sunshine days in December:
23.4 days
The month with the most sunshine days is December (23.4 days).
The month with the least sunshine days is May (13.9 days).
Average UV index
Sumner, OK
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover
Sumner, OK
The month with the most cloud cover is March (Cloud cover 37).
The months with the least cloud cover are June and August (Cloud cover 19).
Average visibility
Sumner, OK
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
