Average Weather in Griffin Georgia, United States
In Griffin, the summers are hot and muggy; the winters are short, cold, and wet; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 36°F to 89°F and is rarely below 22°F or above 96°F.
Based on the tourism score, the best times of year to visit Griffin for warm-weather activities are from late April to mid June and from late August to mid October.
The hot season lasts for 3.5 months, from May 27 to September 13, with an average daily high temperature above 82°F. The hottest day of the year is July 23, with an average high of 89°F and low of 70°F.
The cool season lasts for 2.9 months, from November 27 to February 25, with an average daily high temperature below 61°F. The coldest day of the year is January 25, with an average low of 36°F and high of 55°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 Griffin, 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 Griffin begins around August 1 and lasts for 3.8 months, ending around November 25. On October 15, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 67% of the time, and overcast or mostly cloudy 33% of the time.
The cloudier part of the year begins around November 25 and lasts for 8.2 months, ending around August 1. On January 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 53% of the time, and clear, mostly clear, or partly cloudy 47% 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 Griffin varies throughout the year.
The wetter season lasts 3.1 months, from May 28 to August 30, with a greater than 32% chance of a given day being a wet day. The chance of a wet day peaks at 45% on July 10.
The drier season lasts 8.9 months, from August 30 to May 28. The smallest chance of a wet day is 18% on October 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 45% on July 10.
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. Griffin experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Griffin. The most rain falls during the 31 days centered around February 28, with an average total accumulation of 4.6 inches.
The least rain falls around October 23, with an average total accumulation of 2.6 inches.
Average Monthly Rainfall
The length of the day in Griffin varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 57 minutes of daylight; the longest day is June 21, with 14 hours, 21 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:27 AM on June 12, and the latest sunrise is 1 hour, 30 minutes later at 7:57 AM on November 3. The earliest sunset is at 5:29 PM on December 4, and the latest sunset is 3 hours, 21 minutes later at 8:50 PM on June 30.
Daylight saving time (DST) is observed in Griffin 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
Griffin experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.8 months, from May 13 to October 7, during which time the comfort level is muggy, oppressive, or miserable at least 23% of the time. The muggiest day of the year is July 24, with muggy conditions 92% of the time.
The least muggy day of the year is January 24, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Griffin experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 6.8 months, from October 19 to May 12, with average wind speeds of more than 4.9 miles per hour. The windiest day of the year is February 26, with an average hourly wind speed of 6.0 miles per hour.
The calmer time of year lasts for 5.2 months, from May 12 to October 19. The calmest day of the year is August 8, with an average hourly wind speed of 3.7 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Griffin varies throughout the year.
The wind is most often from the east for 3.7 months, from August 11 to December 3, with a peak percentage of 45% on September 8. The wind is most often from the west for 8.3 months, from December 3 to August 11, with a peak percentage of 32% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Griffin 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 times of year to visit Griffin for general outdoor tourist activities are from late April to mid June and from late August to mid October, with a peak score in the third week of September.
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 Griffin for hot-weather activities is from mid June to mid September, with a peak score in the second week of August.
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 Griffin typically lasts for 7.7 months (234 days), from around March 23 to around November 12, rarely starting before February 22 or after April 18, and rarely ending before October 21 or after December 2.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Griffin should appear around February 7, only rarely appearing before January 21 or after February 24.
Growing Degree Days
The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.
The brighter period of the year lasts for 4.4 months, from April 11 to August 22, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is May 20, with an average of 6.8 kWh.
The darker period of the year lasts for 2.7 months, from November 13 to February 4, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest day of the year is December 23, with an average of 2.6 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Griffin are 33.247 deg latitude, -84.264 deg longitude, and 886 ft elevation.
The topography within 2 miles of Griffin contains only modest variations in elevation, with a maximum elevation change of 207 feet and an average elevation above sea level of 902 feet. Within 10 miles also contains only modest variations in elevation (394 feet). Within 50 miles contains only modest variations in elevation (1,434 feet).
The area within 2 miles of Griffin is covered by artificial surfaces (74%) and trees (25%), within 10 miles by trees (59%) and cropland (29%), and within 50 miles by trees (68%) and artificial surfaces (18%).
This report illustrates the typical weather in Griffin, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Griffin.
For each station, the records are corrected for the elevation difference between that station and Griffin 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 Griffin is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Griffin and a given station.
The stations contributing to this reconstruction are: Griffin Spalding County Airport (96%, 2.4 kilometers, southwest); Atlanta Regional Airport (3.3%, 31 kilometers, northwest); and Baldwin County Airport (0.6%, 96 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .