Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
As Optima steps into January, the average high-temperature holds at a still frosty 48.9°F (9.4°C), hinting at a minor fluctuation from the prior month. In the month of January, the average temperature in Optima dips to a freezing cold 28.9°F (-1.7°C) during the night.Humidity
The average relative humidity in January is 55%.Rainfall
In Optima, in January, during 2.8 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. In Optima, during the entire year, the rain falls for 88.2 days and collects up to 13.39" (340mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. January is the month with the most snowfall. Snow falls for 2.8 days and accumulates 1.85" (47mm) of snow.Daylight
The average length of the day in January is 9h and 59min.On the first day of January, sunrise is at 7:57 am and sunset at 5:39 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 6:09 pm CST.
Sunshine
In January, the average sunshine is 7.4h.UV index
The average daily maximum UV index in January is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The UV index of 3 in January translates into these instructions:
Take necessary precautions - Defending against sun damage is advocated. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in January?
What is the average humidity in January?
How much does it rain in Optima in January?
When does it snow the most in Optima?
How many days does it snow in January?
How many hours of daylight does Optima have in January?
What time are sunrise and sunset in January?
How long on average sun shines in January?
What is the UV index reading in January?
Average temperature in January
Optima, OK
- Average high temperature in January: 48.9°F
The warmest month (with the highest average high temperature) is July (94.5°F).
The month with the lowest average high temperature is December (47.7°F).
- Average low temperature in January: 28.9°F
The month with the highest average low temperature is July (72.1°F).
The coldest months (with the lowest average low temperature) are January and December (28.9°F).
Average pressure in January
Optima, OK
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in January
Optima, OK
- Average wind speed in January: 10.6mph
The windiest month (with the highest average wind speed) is June (13.4mph).
The calmest month (with the lowest average wind speed) is January (10.6mph).
Average humidity in January
Optima, OK
- Average humidity in January: 55%
The month with the highest relative humidity is December (56%).
The month with the lowest relative humidity is June (44%).
Average rainfall in January
Optima, OK
- Average rainfall in January: 0.55"
The wettest month (with the highest rainfall) is July (2.01").
The driest month (with the least rainfall) is November (0.35").
Average rainfall days in January
Optima, OK
- Average rainfall days in January: 2.8 days
The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (2.5 days).
Average snowfall in January
Optima, OK
- Average snowfall in January: 1.85"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Optima, OK
- Average snowfall days in January: 2.8 days
The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Optima, OK
- Average daylight in January: 10h and 0min
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: 7h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in January
Optima, OK
- Average sunshine days in January: 25.5 days
The month with the most sunshine days is January (25.5 days).
The month with the least sunshine days is July (12.7 days).
Average UV index in January
Optima, OK
- Average UV index in January: 3
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 in January
Optima, OK
- Average cloud cover in January: 22
The month with the most cloud cover is February (Cloud cover 26).
The month with the least cloud cover is June (Cloud cover 15).
Average visibility in January
Optima, OK
- Average visibility in January: 6mi
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).
Optima, Oklahoma, USA
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