Climate and monthly weather forecastPlainfield, IN
Climate and monthly weather forecast
The climate of Plainfield
Plainfield, Indiana, USA, is associated with a Humid subtropical climate, known as the Cfa type under the Köppen climate classification. It is characterized by lack of a dry season with rainfall distributed throughout the year. The geographical location also implies that temperature variations are common over the annual cycle, ranging from an average high of 82°F (27.8°C) in July to a low of about 21°F (-6.1°C) in January.Looking at weather trends, this area experiences moderate to high humidity levels ranging from 74% in October to 82% in July, January, and February. The rainfall distribution shows an overall increase from winter to summer, peaking at 4.53" (115mm) in May. However, rainfall days indicate a relatively wetter spring and summer, with May and June recording 21.6 and 19.6 rainy days respectively, suggesting frequent, less intense rain.
Notably, snowy conditions are almost completely limited November through March with it peaking at 4.21" (107mm) in January. The average daylight hours fluctuate over the year, from a minimum of 9.4 hours in December to a maximum of 14.9 hours in June, corresponding to the winter and summer solstices.
The best time to visit Plainfield
The optimal time to visit Plainfield would be between May and September. During this period, the temperature averages from 71.6°F (22°C) to 81°F (27.2°C), offering warm and pleasant weather for outdoor activities. Additionally, the town enjoys the longest daylight hours of about 14 hours, enabling maximum exploration time for visitors. June holds the highest average of sunshine hours with 10.1 hours per day, making it ideal for sun-lovers.The worst time to visit Plainfield
Severe weather conditions are between November and February when average temperatures range from 33.6°F (0.9°C) to 38.3°F (3.5°C) and the shortest daylight hours, specifically 9.4 hours in December. The cold is accompanied by snowfall reaching a maximum of 4.21" (107mm) in January, adding another layer of discomfort for travellers. Furthermore, the area goes through reduced visibility, falling to a low of 5 miles in January and July, primarily due to foggy conditions and increased precipitation, respectively.Spring weather in Plainfield
Spring in Plainfield lasts from March to May, characterized by rising temperatures, increased rainfall, and extended daylight hours. The average highs rise from 49.8°F (9.9°C) in March to 71.6°F (22°C) in May, while lows go from 34.7°F (1.5°C) to 55.4°F (13°C) over the same period. Rainfall follows a similar trend, increasing from 3.31" (84mm) in March to 4.53" (115mm) in May. Correspondingly, the amount of sunshine per day also increases, averaging 6.2 hours in March and jumping to 8.6 hours in May.Summer weather in Plainfield
Summers are perhaps the most exciting season in Plainfield, beginning in June and extending until August. This period is marked by the highest temperatures, averaging between 80.1°F (26.7°C) and 82°F (27.8°C). It's also the sunniest period, delivering between 9.5 and 10.1 hours of sunshine each day, complimented by about 14.5 to 14.9 daylight hours overall. Despite the high temperatures, the refreshing average winds of 5.8mph (9.3km/h) to 7mph (11.3km/h) help moderate the heat.Autumn weather in Plainfield
Autumn, extending from September to November, brings milder temperatures and a gradual decrease in daylight hours. The temperature decreases from 75.7°F (24.3°C) in September to 49.5°F (9.7°C) in November, while daylight hours reduce from 12.4 hours to 10 hours. A notable feature of autumn in Plainfield is the gradual shift from rainfall to snowfall, starting from no snow in September to 1.14" (29mm) in November.Winter weather in Plainfield
Winter in Plainfield extends from December through February, marked by the coldest temperatures and significant snowfall. The average high temperatures go from 38.5°F (3.6°C) in December to 33.6°F (0.9°C) in January, while lows drop from 28°F (-2.2°C) to 21°F (-6.1°C). Snowfall peaks in January with 4.21" (107mm). Daylight hours are shortest during winter, with December recording the shortest overall daylight of 9.4 hours. With just 4.1 hours of sunshine per day in December and January, these months rank as the least sunny of the year.Weather in January
Throughout the month, Plainfield experiences colder weather conditions, with snow turning its landscapes into winter wonderlands. January is marked by the coldest average minimum temperatures, reaching down to 21°F (-6.1°C), making it the chilliest month in this Indiana city. Weather in January »Weather in February
February continues with the winter temperatures, but brings a slight rise from the frigid conditions of January, paving the way to the first signs of spring. The amount of daylight starts to increase, hinting at longer, brighter days ahead. Weather in February »Weather in March
March ushers in the spring season to Plainfield, bringing a significant shift in weather patterns. The city witnesses a noticeable increase in temperature and rainfall from 2.32" (59mm) in February to 3.31" (84mm) in March. The melting of the accumulated winter snowfall and the increased rainfall contributes to the rejuvenation of city's vegetation. Weather in March »Weather in April
With April, the city of Plainfield enters fully into spring, with weather conditons that are milder than March. Rainy days become frequent featuring the peak average rainfall of the year, recording at 4.37" (111mm). As rainfall nourishes nature, residents enjoy the colorful bloom of flowers, transforming city parks into vibrant spaces of relaxation. Weather in April »Weather in May
May kicks off the transition from spring to summer in Plainfield, resulting in considerably warmer temperatures than April. Clear skies and sunshine become frequent, rendering outdoor environments delightful. Green landscapes are enriched by floral accents, adding to the charm of the city's public spaces. Weather in May »Weather in June
Residing in the heart of summer, June in Plainfield presents a significant rise in average temperatures. The peak average high temperature of the year is observed in June, escalating to 80.1°F (26.7°C). This incites the commencement of summer activities such as pool parties, barbecues, and trips to local attractions. Weather in June »Weather in July
July in Plainfield continues the steady pace of summer, but with slight variations in weather. While the hot summer days continue, the average temperatures slightly exceed those of June, making this the warmest month of the year. The frequent sunshine encourages Plainfield inhabitants to make the most of outdoor activities and water sports. Weather in July »Weather in August
August depicts a slow transition from the simmering summer towards the upcoming fall season in Plainfield. The high temperatures from July continue, but with a slight decrease, hinting towards the end of the hot season. This subtle change in weather conditions does not deter the vibing outdoor activities, as the month still basks in strong sunshine. Weather in August »Weather in September
September brings a noticeable shift in weather as Plainfield begins to transition from the blazing summers into the charm of fall. The drastic decrease in temperature from August's 81°F (27.2°C) to 75.7°F (24.3°C) ushers in the cooler autumn temperatures. Weather in September »Weather in October
October introduces the full swing of autumn to Plainfield, with weather conditions that are markedly cooler than September. The fall foliage reaches its peak during this month, transforming cityscapes into fiery spectacles of colors. Weather in October »Weather in November
The transition from the vivid autumn to the chill of winter starts with November in Plainfield. A major dip in temperature from 63.1°F (17.3°C) in October to 49.5°F (9.7°C) is observed, reflecting the colder weather sips into the city. Weather in November »Weather in December
December marks the advent of winter in Plainfield, introducing more frigid weather conditions than November. With the return of significant snowfall, amounting to 3.82" (97mm), the city dons its winter attire. December thus becomes the month of snowflakes and ice, creating a picturesque white landscape. Weather in December »Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature
Plainfield, IN
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).
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure
Plainfield, IN
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.97"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:
30.03"Hg - Average pressure in November:
30.13"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
Plainfield, IN
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.6mph - Average wind speed in May:
7.9mph - Average wind speed in June:
7mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.8mph - Average wind speed in September:
6.5mph - Average wind speed in October:
8.4mph - Average wind speed in November:
8.9mph - Average wind speed in December:
9.1mph
The windiest months (with the highest average wind speed) are January and February (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity
Plainfield, IN
The months with the highest relative humidity are July and December (82%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Plainfield, IN
- Average rainfall in January:
2.68" - Average rainfall in February:
2.32" - Average rainfall in March:
3.31" - Average rainfall in April:
4.37" - Average rainfall in May:
4.53" - Average rainfall in June:
4.09"
- Average rainfall in July:
3.15" - Average rainfall in August:
2.72" - Average rainfall in September:
2.32" - Average rainfall in October:
2.56" - Average rainfall in November:
2.4" - Average rainfall in December:
2.72"
The wettest month (with the highest rainfall) is May (4.53").
The driest months (with the least rainfall) are February and September (2.32").
Average rainfall days
Plainfield, IN
- Average rainfall days in January:
9.5 days - Average rainfall days in February:
9.6 days - Average rainfall days in March:
15.2 days - Average rainfall days in April:
17.5 days - Average rainfall days in May:
21.6 days - Average rainfall days in June:
19.6 days
- Average rainfall days in July:
18.4 days - Average rainfall days in August:
17.3 days - Average rainfall days in September:
14.5 days - Average rainfall days in October:
14.1 days - Average rainfall days in November:
11.9 days - Average rainfall days in December:
10.7 days
The month with the highest number of rainy days is May (21.6 days).
The month with the least rainy days is January (9.5 days).
Average snowfall
Plainfield, IN
- Average snowfall in January:
4.21" - Average snowfall in February:
3.39" - Average snowfall in March:
2.2" - Average snowfall in April:
0.24" - Average snowfall in May:
0.04" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.21").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Plainfield, IN
- Average snowfall days in January:
11.8 days - Average snowfall days in February:
10 days - Average snowfall days in March:
5.1 days - Average snowfall days in April:
0.9 days - Average snowfall days in May:
0.2 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:
0.3 days - Average snowfall days in November:
3.1 days - Average snowfall days in December:
9 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Plainfield, 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:
14h and 54min
- 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: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 6min - Average sunshine in February:
5h and 12min - Average sunshine in March:
6h and 12min - Average sunshine in April:
7h and 6min - Average sunshine in May:
8h and 36min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 30min - Average sunshine in September:
8h and 18min - Average sunshine in October:
6h and 42min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 6min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The months with the least sunshine are January and December (Average sunshine: 4h and 6min).
Average sunshine days
Plainfield, IN
- Average sunshine days in January:
11.7 days - Average sunshine days in February:
11 days - Average sunshine days in March:
11.8 days - Average sunshine days in April:
10.7 days - Average sunshine days in May:
7.3 days - Average sunshine days in June:
8 days
- Average sunshine days in July:
8.4 days - Average sunshine days in August:
10.5 days - Average sunshine days in September:
13 days - Average sunshine days in October:
15.4 days - Average sunshine days in November:
15.6 days - Average sunshine days in December:
13.3 days
The month with the most sunshine days is November (15.6 days).
The month with the least sunshine days is May (7.3 days).
Average UV index
Plainfield, 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, October, November and December (UV index 2).
Average cloud cover
Plainfield, IN
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Plainfield, IN
The months with the highest visibility are February, March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, July and December (5mi).





