Average Weather in Rumford Maine, United States
In Rumford, the summers are comfortable and wet, the winters are freezing and snowy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 8°F to 78°F and is rarely below -9°F or above 86°F.
Based on the tourism score, the best time of year to visit Rumford for warm-weather activities is from late June to early September.
The warm season lasts for 3.7 months, from May 26 to September 17, with an average daily high temperature above 67°F. The hottest day of the year is July 27, with an average high of 78°F and low of 58°F.
The cold season lasts for 3.3 months, from December 1 to March 12, with an average daily high temperature below 36°F. The coldest day of the year is January 29, with an average low of 8°F and high of 26°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
In Rumford, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Rumford begins around June 27 and lasts for 3.9 months, ending around October 22. On September 2, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 62% of the time, and overcast or mostly cloudy 38% of the time.
The cloudier part of the year begins around October 22 and lasts for 8.1 months, ending around June 27. On February 28, the cloudiest day of the year, the sky is overcast or mostly cloudy 59% of the time, and clear, mostly clear, or partly cloudy 41% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Rumford varies throughout the year.
The wetter season lasts 3.7 months, from May 2 to August 24, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 40% on July 26.
The drier season lasts 8.3 months, from August 24 to May 2. The smallest chance of a wet day is 20% on February 4.
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 in Rumford changes throughout the year.
Rain alone is the most common for 8.6 months, from March 15 to December 3. The highest chance of a day with rain alone is 40% on July 26.
Snow alone is the most common for 3.4 months, from December 3 to March 15. The highest chance of a day with snow alone is 16% on December 30.
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. Rumford experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Rumford. The most rain falls during the 31 days centered around October 22, with an average total accumulation of 3.9 inches.
The least rain falls around February 6, with an average total accumulation of 0.8 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. Rumford experiences significant seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 6.3 months, from October 22 to May 1, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 30, with an average total liquid-equivalent accumulation of 1.7 inches.
The snowless period of the year lasts for 5.7 months, from May 1 to October 22. The least snow falls around July 13, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Rumford varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 49 minutes of daylight; the longest day is June 21, with 15 hours, 34 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:56 AM on June 15, and the latest sunrise is 2 hours, 26 minutes later at 7:22 AM on November 3. The earliest sunset is at 4:02 PM on December 10, and the latest sunset is 4 hours, 29 minutes later at 8:31 PM on June 27.
Daylight saving time (DST) is observed in Rumford 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
Rumford experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.0 months, from June 13 to September 14, during which time the comfort level is muggy, oppressive, or miserable at least 4% of the time. The muggiest day of the year is July 29, with muggy conditions 15% of the time.
The least muggy day of the year is March 3, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Rumford experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.2 months, from November 21 to April 28, with average wind speeds of more than 5.3 miles per hour. The windiest day of the year is February 20, with an average hourly wind speed of 7.0 miles per hour.
The calmer time of year lasts for 6.8 months, from April 28 to November 21. The calmest day of the year is August 7, with an average hourly wind speed of 3.6 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Rumford is from the west throughout the year.
Best Time of Year to Visit
To characterize how pleasant the weather is in Rumford 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 Rumford for general outdoor tourist activities is from late June to early September, with a peak score in the last week of July.
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 Rumford for hot-weather activities is from early July to mid August, with a peak score in the last week of July.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
The growing season in Rumford typically lasts for 4.7 months (144 days), from around May 12 to around October 3, rarely starting before April 24 or after May 30, and rarely ending before September 15 or after October 20.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Rumford should appear around May 8, only rarely appearing before April 28 or after May 18.
Growing Degree Days
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.5 months, from May 7 to August 24, with an average daily incident shortwave energy per square meter above 5.6 kWh. The brightest day of the year is July 2, with an average of 6.7 kWh.
The darker period of the year lasts for 3.3 months, from October 30 to February 8, with an average daily incident shortwave energy per square meter below 2.4 kWh. The darkest day of the year is December 17, with an average of 1.4 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Rumford are 44.554 deg latitude, -70.551 deg longitude, and 807 ft elevation.
The topography within 2 miles of Rumford contains very significant variations in elevation, with a maximum elevation change of 1,079 feet and an average elevation above sea level of 769 feet. Within 10 miles contains very significant variations in elevation (2,231 feet). Within 50 miles contains large variations in elevation (6,260 feet).
The area within 2 miles of Rumford is covered by trees (71%) and artificial surfaces (24%), within 10 miles by trees (96%), and within 50 miles by trees (90%).
This report illustrates the typical weather in Rumford, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Rumford.
For each station, the records are corrected for the elevation difference between that station and Rumford 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 Rumford is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Rumford and a given station.
The stations contributing to this reconstruction are: Berlin Municipal Airport (28%, 50 kilometers, west); Auburn/Lewiston Municipal Airport (21%, 60 kilometers, south); Augusta State Airport (18%, 66 kilometers, southeast); Waterville Robert Lafleur Airport (17%, 70 kilometers, east); and Fryeburg/Eastern Slopes Regional Airport (17%, 70 kilometers, southwest).
Time zones for aiports and weather stations are provided by AskGeo.com .