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
In Jonestown, January is the month with the lowest recorded average temperatures, measuring a high of 33.6°F (0.9°C) and a low of 21.2°F (-6°C).Humidity
The average relative humidity in January is 78%.Rainfall
In Jonestown, in January, it is raining for 9.1 days, with typically 2.52" (64mm) of accumulated precipitation. Throughout the year, there are 166.3 rainfall days, and 34.53" (877mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. January is the month with the most snowfall. Snow falls for 10.1 days and accumulates 5.08" (129mm) of snow.Daylight
In Jonestown, the average length of the day in January is 9h and 41min.On the first day of January in Jonestown, sunrise is at 7:28 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 5:22 pm EST.
Sunshine
In January, the average sunshine in Jonestown is 4.4h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In January, the UV index of 2 transforms into the following advice:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Enhance your sun protection with tightly woven, yet airy clothing. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is January in Jonestown?
What is the average humidity in January in Jonestown?
How many days does it rain in January?
What is the snowiest month?
How much does it snow in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How long on average sun shines in January?
When is the lowest UV index?
What is the UV index intensity in January in Jonestown?
Average temperature in January
Jonestown, PA
- Average high temperature in January: 33.6°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in January: 21.2°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in January
Jonestown, PA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Jonestown, PA
- Average wind speed in January: 8.3mph
The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Jonestown, PA
- Average humidity in January: 78%
The months with the highest relative humidity are February, May, June and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in January
Jonestown, PA
- Average rainfall in January: 2.52"
The wettest months (with the highest rainfall) are May and July (3.58").
The driest month (with the least rainfall) is September (2.32").
Average rainfall days in January
Jonestown, PA
- Average rainfall days in January: 9.1 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in January
Jonestown, PA
- Average snowfall in January: 5.08"
The month with the highest snowfall is January (5.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Jonestown, PA
- Average snowfall days in January: 10.1 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Jonestown, PA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in January
Jonestown, PA
- Average sunshine days in January: 14.7 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in January
Jonestown, PA
- Average UV index in January: 2
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Jonestown, PA
- Average cloud cover in January: 51
The months with the most cloud cover are February and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in January
Jonestown, PA
- Average visibility in January: 5mi
The months with the highest visibility are March, April, June, July and November (6mi).
The months with the lowest visibility are January, February, May, August, September, October and December (5mi).
Jonestown, Pennsylvania, USA
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