Average Weather in Grenaa Denmark
In Grenaa, the summers are comfortable and partly cloudy; the winters are long, very cold, and mostly cloudy; and it is windy year round. Over the course of the year, the temperature typically varies from 30°F to 70°F and is rarely below 17°F or above 78°F.
Based on the tourism score, the best time of year to visit Grenaa for warm-weather activities is from late June to late August.
The warm season lasts for 3.0 months, from June 7 to September 8, with an average daily high temperature above 63°F. The hottest day of the year is August 1, with an average high of 70°F and low of 56°F.
The cold season lasts for 4.0 months, from November 23 to March 23, with an average daily high temperature below 44°F. The coldest day of the year is February 8, with an average low of 30°F and high of 37°F.
Average High and Low Temperature
Average Hourly Temperature
In Grenaa, 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 Grenaa begins around April 17 and lasts for 6.0 months, ending around October 16. On July 7, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 58% of the time, and overcast or mostly cloudy 42% of the time.
The cloudier part of the year begins around October 16 and lasts for 6.0 months, ending around April 17. On December 18, the cloudiest day of the year, the sky is overcast or mostly cloudy 68% of the time, and clear, mostly clear, or partly cloudy 32% 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 Grenaa varies throughout the year.
The wetter season lasts 7.5 months, from June 18 to February 3, with a greater than 27% chance of a given day being a wet day. The chance of a wet day peaks at 34% on October 30.
The drier season lasts 4.5 months, from February 3 to June 18. The smallest chance of a wet day is 20% on April 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 34% on October 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. Grenaa experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Grenaa. The most rain falls during the 31 days centered around October 19, with an average total accumulation of 2.3 inches.
The least rain falls around February 24, with an average total accumulation of 1.1 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Grenaa does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Grenaa varies extremely over the course of the year. In 2017, the shortest day is December 21, with 6 hours, 51 minutes of daylight; the longest day is June 21, with 17 hours, 44 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:25 AM on June 18, and the latest sunrise is 4 hours, 25 minutes later at 8:50 AM on December 28. The earliest sunset is at 3:38 PM on December 14, and the latest sunset is 6 hours, 32 minutes later at 10:10 PM on June 23.
Daylight saving time (DST) is observed in Grenaa during 2017, starting in the spring on March 26, lasting 7.1 months, and ending in the fall on October 29.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level in Grenaa, 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, staying within 1% of 1% throughout.
Humidity Comfort Levels
The average hourly wind speed in Grenaa experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 6.2 months, from September 17 to March 24, with average wind speeds of more than 14.2 miles per hour. The windiest day of the year is January 24, with an average hourly wind speed of 16.9 miles per hour.
The calmer time of year lasts for 5.8 months, from March 24 to September 17. The calmest day of the year is July 15, with an average hourly wind speed of 11.5 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Grenaa varies throughout the year.
The wind is most often from the south for 4.3 weeks, from October 26 to November 25, with a peak percentage of 36% on November 9. The wind is most often from the west for 11 months, from November 25 to October 26, with a peak percentage of 39% on January 1.
Grenaa 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 3.0 months, from June 17 to September 19, with an average temperature above 58°F. The day of the year with the warmest water is August 4, with an average temperature of 64°F.
The time of year with cooler water lasts for 4.0 months, from December 10 to April 11, with an average temperature below 41°F. The day of the year with the coolest water is February 18, with an average temperature of 36°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Grenaa 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 Grenaa for general outdoor tourist activities is from late June to late August, 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 Grenaa for hot-weather activities is from mid July to mid August, with a peak score in the last week of July.
The growing season in Grenaa typically lasts for 6.3 months (192 days), from around April 20 to around October 30, rarely starting before April 3 or after May 8, and rarely ending before October 8 or after November 27.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Grenaa should appear around May 18, only rarely appearing before May 5 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 3.3 months, from May 3 to August 11, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest day of the year is June 25, with an average of 6.4 kWh.
The darker period of the year lasts for 4.1 months, from October 19 to February 24, with an average daily incident shortwave energy per square meter below 1.5 kWh. The darkest day of the year is December 20, with an average of 0.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Grenaa are 56.416 deg latitude, 10.878 deg longitude, and 26 ft elevation.
The topography within 2 miles of Grenaa contains only modest variations in elevation, with a maximum elevation change of 151 feet and an average elevation above sea level of 31 feet. Within 10 miles also contains only modest variations in elevation (249 feet). Within 50 miles contains only modest variations in elevation (509 feet).
The area within 2 miles of Grenaa is covered by cropland (47%), artificial surfaces (36%), and grassland (10%), within 10 miles by water (48%) and cropland (40%), and within 50 miles by water (70%) and cropland (22%).
This report illustrates the typical weather in Grenaa, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Grenaa.
For each station, the records are corrected for the elevation difference between that station and Grenaa 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 Grenaa is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Grenaa and a given station.
The stations contributing to this reconstruction are: Aarhus Airport (65%, 21 kilometers, southwest); Anholt Island Automated Reporting Station (16%, 52 kilometers, northeast); Hadsund (14%, 57 kilometers, northwest); and Værløse (4.9%, 116 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .