Average Weather in Plainfield Connecticut, United States
In Plainfield, the summers are warm, the winters are freezing and wet, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 20°F to 82°F and is rarely below 5°F or above 89°F.
Based on the tourism score, the best time of year to visit Plainfield for warm-weather activities is from mid June to mid September.
The warm season lasts for 3.5 months, from June 2 to September 17, with an average daily high temperature above 72°F. The hottest day of the year is July 21, with an average high of 82°F and low of 64°F.
The cold season lasts for 3.3 months, from December 4 to March 13, with an average daily high temperature below 45°F. The coldest day of the year is January 30, with an average low of 20°F and high of 36°F.
Average High and Low Temperature
Average Hourly Temperature
In Plainfield, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in Plainfield begins around June 25 and lasts for 4.6 months, ending around November 11. On September 6, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 64% of the time, and overcast or mostly cloudy 36% of the time.
The cloudier part of the year begins around November 11 and lasts for 7.4 months, ending around June 25. On February 28, the cloudiest day of the year, the sky is overcast or mostly cloudy 55% of the time, and clear, mostly clear, or partly cloudy 45% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Plainfield varies throughout the year.
The wetter season lasts 8.9 months, from March 24 to December 21, with a greater than 28% chance of a given day being a wet day. The chance of a wet day peaks at 33% on May 31.
The drier season lasts 3.1 months, from December 21 to March 24. The smallest chance of a wet day is 23% on January 29.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 33% on May 31.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Plainfield experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Plainfield. The most rain falls during the 31 days centered around April 3, with an average total accumulation of 3.8 inches.
The least rain falls around January 23, with an average total accumulation of 2.0 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Plainfield experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 5.2 months, from November 6 to April 11, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 26, with an average total liquid-equivalent accumulation of 1.0 inches.
The snowless period of the year lasts for 6.8 months, from April 11 to November 6. The least snow falls around July 18, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Plainfield varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 9 minutes of daylight; the longest day is June 21, with 15 hours, 12 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:12 AM on June 14, and the latest sunrise is 2 hours, 10 minutes later at 7:22 AM on November 3. The earliest sunset is at 4:17 PM on December 8, and the latest sunset is 4 hours, 9 minutes later at 8:26 PM on June 27.
Daylight saving time (DST) is observed in Plainfield during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
Plainfield experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.4 months, from June 11 to September 23, during which time the comfort level is muggy, oppressive, or miserable at least 11% of the time. The muggiest day of the year is August 2, with muggy conditions 43% of the time.
The least muggy day of the year is December 12, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Plainfield experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 6.0 months, from October 25 to April 25, with average wind speeds of more than 5.9 miles per hour. The windiest day of the year is February 23, with an average hourly wind speed of 7.5 miles per hour.
The calmer time of year lasts for 6.0 months, from April 25 to October 25. The calmest day of the year is August 1, with an average hourly wind speed of 4.2 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Plainfield varies throughout the year.
The wind is most often from the south for 1.3 weeks, from May 15 to May 24 and for 2.1 months, from July 20 to September 22, with a peak percentage of 39% on July 28. The wind is most often from the west for 1.9 months, from May 24 to July 20 and for 7.8 months, from September 22 to May 15, with a peak percentage of 39% on July 7.
Plainfield is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature experiences significant seasonal variation over the course of the year.
The time of year with warmer water lasts for 3.4 months, from June 27 to October 8, with an average temperature above 63°F. The day of the year with the warmest water is August 13, with an average temperature of 69°F.
The time of year with cooler water lasts for 3.6 months, from January 1 to April 20, with an average temperature below 45°F. The day of the year with the coolest water is February 27, with an average temperature of 39°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Plainfield throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Plainfield for general outdoor tourist activities is from mid June to mid September, with a peak score in the last week of August.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Plainfield for hot-weather activities is from early July to mid August, with a peak score in the last week of July.
The growing season in Plainfield typically lasts for 6.0 months (184 days), from around April 18 to around October 19, rarely starting before April 1 or after May 6, and rarely ending before October 1 or after November 5.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Plainfield should appear around April 24, only rarely appearing before April 11 or after May 4.
Growing Degree Days
The brighter period of the year lasts for 3.5 months, from May 3 to August 20, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is June 30, with an average of 6.9 kWh.
The darker period of the year lasts for 3.2 months, from November 4 to February 12, with an average daily incident shortwave energy per square meter below 2.7 kWh. The darkest day of the year is December 23, with an average of 1.7 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Plainfield are 41.676 deg latitude, -71.915 deg longitude, and 220 ft elevation.
The topography within 2 miles of Plainfield contains only modest variations in elevation, with a maximum elevation change of 472 feet and an average elevation above sea level of 257 feet. Within 10 miles contains only modest variations in elevation (781 feet). Within 50 miles contains significant variations in elevation (1,381 feet).
The area within 2 miles of Plainfield is covered by trees (72%) and artificial surfaces (24%), within 10 miles by trees (92%), and within 50 miles by trees (56%) and water (25%).
This report illustrates the typical weather in Plainfield, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Plainfield.
For each station, the records are corrected for the elevation difference between that station and Plainfield according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Plainfield is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Plainfield and a given station.
The stations contributing to this reconstruction are: Windham Airport (34%, 24 kilometers, west); Westerly State Airport (17%, 38 kilometers, south); Groton-New London Airport (15%, 40 kilometers, south); Theodore Francis Green State Airport (15%, 40 kilometers, east); North Central State Airport (13%, 44 kilometers, northeast); and Worcester, Worcester Regional Airport (7%, 66 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .