Average Weather in Penryn United Kingdom
In Penryn, the summers are cool and windy; the winters are long, cold, wet, and extremely windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 40°F to 66°F and is rarely below 32°F or above 72°F.
Based on the tourism score, the best time of year to visit Penryn for warm-weather activities is from late June to early September.
The warm season lasts for 3.0 months, from June 20 to September 18, with an average daily high temperature above 62°F. The hottest day of the year is August 1, with an average high of 66°F and low of 57°F.
The cool season lasts for 4.3 months, from November 25 to April 2, with an average daily high temperature below 51°F. The coldest day of the year is February 18, with an average low of 40°F and high of 48°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 Penryn, 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 Penryn begins around March 30 and lasts for 6.5 months, ending around October 12. On July 24, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 55% of the time, and overcast or mostly cloudy 45% of the time.
The cloudier part of the year begins around October 12 and lasts for 5.5 months, ending around March 30. On December 25, the cloudiest day of the year, the sky is overcast or mostly cloudy 66% of the time, and clear, mostly clear, or partly cloudy 34% 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 Penryn varies throughout the year.
The wetter season lasts 4.7 months, from October 2 to February 22, with a greater than 34% chance of a given day being a wet day. The chance of a wet day peaks at 45% on January 6.
The drier season lasts 7.4 months, from February 22 to October 2. The smallest chance of a wet day is 22% on July 24.
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 January 6.
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. Penryn experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Penryn. The most rain falls during the 31 days centered around January 1, with an average total accumulation of 3.7 inches.
The least rain falls around May 5, with an average total accumulation of 1.7 inches.
Average Monthly Rainfall
The length of the day in Penryn varies extremely over the course of the year. In 2021, the shortest day is December 21, with 8 hours, 3 minutes of daylight; the longest day is June 21, with 16 hours, 24 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:09 AM on June 16, and the latest sunrise is 3 hours, 10 minutes later at 8:19 AM on December 31. The earliest sunset is at 4:17 PM on December 12, and the latest sunset is 5 hours, 17 minutes later at 9:34 PM on June 25.
Daylight saving time (DST) is observed in Penryn during 2021, starting in the spring on March 28, lasting 7.1 months, and ending in the fall on October 31.
Sunrise & Sunset with Twilight and Daylight Saving Time
The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.
Moon Rise, Set & Phases
The perceived humidity level in Penryn, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.
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 Penryn experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.5 months, from October 12 to March 26, with average wind speeds of more than 16.9 miles per hour. The windiest day of the year is January 1, with an average hourly wind speed of 20.5 miles per hour.
The calmer time of year lasts for 6.5 months, from March 26 to October 12. The calmest day of the year is August 4, with an average hourly wind speed of 13.2 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Penryn varies throughout the year.
The wind is most often from the north for 1.4 weeks, from April 17 to April 27, with a peak percentage of 27% on April 22. The wind is most often from the east for 4.0 days, from April 27 to May 1, with a peak percentage of 26% on April 28. The wind is most often from the west for 12 months, from May 1 to April 17, with a peak percentage of 40% on January 1.
Penryn 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 some seasonal variation over the course of the year.
The time of year with warmer water lasts for 2.7 months, from July 3 to September 25, with an average temperature above 60°F. The day of the year with the warmest water is August 8, with an average temperature of 62°F.
The time of year with cooler water lasts for 4.1 months, from December 31 to May 2, with an average temperature below 51°F. The day of the year with the coolest water is March 7, with an average temperature of 49°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Penryn 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 Penryn 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 Penryn for hot-weather activities is from mid July to early 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 Penryn typically lasts for 9.9 months (299 days), from around February 26 to around December 22, rarely starting before January 20 or after April 1, and rarely ending before November 21 or after January 15.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Penryn should appear around May 11, only rarely appearing before April 27 or after May 29.
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 3.4 months, from May 3 to August 14, with an average daily incident shortwave energy per square meter above 5.5 kWh. The brightest day of the year is June 27, with an average of 6.7 kWh.
The darker period of the year lasts for 3.8 months, from October 26 to February 19, with an average daily incident shortwave energy per square meter below 1.9 kWh. The darkest day of the year is December 25, with an average of 0.7 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Penryn are 50.168 deg latitude, -5.104 deg longitude, and 98 ft elevation.
The topography within 2 miles of Penryn contains significant variations in elevation, with a maximum elevation change of 607 feet and an average elevation above sea level of 222 feet. Within 10 miles contains significant variations in elevation (820 feet). Within 50 miles also contains very significant variations in elevation (1,407 feet).
The area within 2 miles of Penryn is covered by cropland (51%), artificial surfaces (24%), and grassland (14%), within 10 miles by cropland (44%) and water (26%), and within 50 miles by water (81%).
This report illustrates the typical weather in Penryn, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Penryn.
For each station, the records are corrected for the elevation difference between that station and Penryn 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 Penryn is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Penryn and a given station.
Time zones for airports and weather stations are provided by AskGeo.com .