Climate and monthly weather forecastFoster, IN
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Foster, Indiana, with an average temperature varying between 31.6°F (-0.2°C) and 20.5°F (-6.4°C). The coldest period is January, when temperatures fluctuate between an average high of 31.6°F (-0.2°C) and a low of 20.5°F (-6.4°C). Weather in January »Weather in February
The last month of the winter, February, is a cold month in Foster, Indiana, with an average temperature ranging between min 23.9°F (-4.5°C) and max 37°F (2.8°C). February introduces a minor temperature shift, with average high-temperatures adjusting from January's freezing cold 31.6°F (-0.2°C) to a wintry 37°F (2.8°C). Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Foster, Indiana, with temperature in the range of an average low of 34.9°F (1.6°C) and an average high of 49.1°F (9.5°C). March's onset brings a rise in the average high-temperature, moving from a wintry 37°F (2.8°C) in February to a chilly 49.1°F (9.5°C). Weather in March »Weather in April
April in Foster, Indiana, is a comfortable spring month, with an average temperature ranging between max 61.2°F (16.2°C) and min 45°F (7.2°C). An increase in the average high-temperature marks April, moving from March's frosty 49.1°F (9.5°C) to a refreshing 61.2°F (16.2°C). Weather in April »Weather in May
May, the last month of the spring in Foster, is a pleasant month, with an average temperature ranging between min 55°F (12.8°C) and max 71.8°F (22.1°C). Noticing a change, the average high-temperature during May moves from April's enjoyable 61.2°F (16.2°C) to an agreeable 71.8°F (22.1°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Foster, Indiana, with temperature in the range of an average high of 79.9°F (26.6°C) and an average low of 63.3°F (17.4°C). The arrival of June signals a slight increase in the average high-temperature, moving from an agreeable 71.8°F (22.1°C) in May to a moderately hot 79.9°F (26.6°C). Weather in June »Weather in July
July, like June, in Foster, Indiana, is another warm summer month, with an average temperature varying between 64.9°F (18.3°C) and 81.3°F (27.4°C). July is the warmest month, with the temperature often reaching an average high of 81.3°F (27.4°C) and an average low of 64.9°F (18.3°C). The average heat index in July is estimated at a hot 87.8°F (31°C). Weather in July »Weather in August
August, the last month of the summer in Foster, is also a moderately hot month, with an average temperature fluctuating between 80.6°F (27°C) and 63.3°F (17.4°C). Foster records an average high-temperature of a still warm 80.6°F (27°C) in August, maintaining a close correlation with July's 81.3°F (27.4°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Foster, Indiana, with an average temperature varying between 57.7°F (14.3°C) and 76.1°F (24.5°C). A minimal variation is noted in Foster's average high-temperature at the onset of September, reaching a still moderately hot 76.1°F (24.5°C) from August's 80.6°F (27°C). Weather in September »Weather in October
October, like September, in Foster, Indiana, is another refreshing autumn month, with an average temperature varying between 63.1°F (17.3°C) and 47.1°F (8.4°C). As September transitions into October, Foster sees a drop in the average high-temperature, transitioning from a moderately hot 76.1°F (24.5°C) to a comfortable 63.1°F (17.3°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Foster, Indiana, with temperature in the range of an average high of 48.9°F (9.4°C) and an average low of 35.6°F (2°C). With the onset of November, Foster experiences a modest temperature adjustment, with the average high-temperature receding from a comfortable 63.1°F (17.3°C) in October to a chilly 48.9°F (9.4°C). Weather in November »Weather in December
December, the first month of the winter in Foster, is also an icy month, with an average temperature varying between 27.5°F (-2.5°C) and 37.6°F (3.1°C). Foster's December weather comes with a decrease in average high-temperatures, moving from a chilly 48.9°F (9.4°C) in November to an icy 37.6°F (3.1°C). Weather in December »Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature
Foster, IN
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.6°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure
Foster, IN
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Foster, IN
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10.2mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.2mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7.1mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.7mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity
Foster, IN
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Foster, IN
- Average rainfall in January:
1.61" - Average rainfall in February:
1.38" - Average rainfall in March:
2.32" - Average rainfall in April:
3.23" - Average rainfall in May:
3.15" - Average rainfall in June:
2.91"
- Average rainfall in July:
2.44" - Average rainfall in August:
2.24" - Average rainfall in September:
1.38" - Average rainfall in October:
2.05" - Average rainfall in November:
1.46" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is April (3.23").
The driest months (with the least rainfall) are February and September (1.38").
Average rainfall days
Foster, IN
- Average rainfall days in January:
7.3 days - Average rainfall days in February:
6.6 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
15.3 days - Average rainfall days in May:
18 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
14.6 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
12.4 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
8.8 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (6.6 days).
Average snowfall
Foster, IN
The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Foster, IN
- Average snowfall days in January:
10.6 days - Average snowfall days in February:
8.9 days - Average snowfall days in March:
4.3 days - Average snowfall days in April:
0.9 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:
0.1 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
7.9 days
The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Foster, IN
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
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 24min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 6min - Average sunshine in March:
6h and 12min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 48min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 54min - Average sunshine in September:
8h and 48min - Average sunshine in October:
6h and 18min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Foster, IN
- Average sunshine days in January:
15 days - Average sunshine days in February:
13.1 days - Average sunshine days in March:
14.6 days - Average sunshine days in April:
11.6 days - Average sunshine days in May:
10 days - Average sunshine days in June:
10.2 days
- Average sunshine days in July:
9.5 days - Average sunshine days in August:
11.9 days - Average sunshine days in September:
15.2 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
18 days - Average sunshine days in December:
15.6 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (9.5 days).
Average UV index
Foster, IN
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Foster, IN
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are June, August and September (Cloud cover 32).
Average visibility
Foster, IN
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).





