Average Weather in Blatná Czechia
In Blatná, the summers are comfortable; the winters are freezing, dry, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 24°F to 74°F and is rarely below 9°F or above 86°F.
Based on the tourism score, the best time of year to visit Blatná for warm-weather activities is from late June to late August.
The warm season lasts for 3.4 months, from May 28 to September 10, with an average daily high temperature above 66°F. The hottest day of the year is August 5, with an average high of 74°F and low of 55°F.
The cold season lasts for 3.6 months, from November 17 to March 5, with an average daily high temperature below 41°F. The coldest day of the year is January 20, with an average low of 24°F and high of 33°F.
Average High and Low Temperature
Average Hourly Temperature
In Blatná, 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 Blatná begins around April 13 and lasts for 5.7 months, ending around October 4. On August 4, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 59% of the time, and overcast or mostly cloudy 41% of the time.
The cloudier part of the year begins around October 4 and lasts for 6.3 months, ending around April 13. On November 16, the cloudiest day of the year, the sky is overcast or mostly cloudy 69% of the time, and clear, mostly clear, or partly cloudy 31% 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 Blatná varies throughout the year.
The wetter season lasts 4.1 months, from May 7 to September 11, with a greater than 27% chance of a given day being a wet day. The chance of a wet day peaks at 37% on June 12.
The drier season lasts 7.9 months, from September 11 to May 7. The smallest chance of a wet day is 17% on February 27.
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 37% on June 12.
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. Blatná experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Blatná. The most rain falls during the 31 days centered around July 19, with an average total accumulation of 3.0 inches.
The least rain falls around February 15, with an average total accumulation of 0.6 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. Blatná experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.3 months, from November 12 to March 23, 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 17, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 7.7 months, from March 23 to November 12. The least snow falls around July 27, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Blatná varies extremely over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 10 minutes of daylight; the longest day is June 21, with 16 hours, 17 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:57 AM on June 16, and the latest sunrise is 3 hours, 3 minutes later at 8:00 AM on January 1. The earliest sunset is at 4:05 PM on December 12, and the latest sunset is 5 hours, 10 minutes later at 9:14 PM on June 25.
Daylight saving time (DST) is observed in Blatná during 2018, starting in the spring on March 25, lasting 7.1 months, and ending in the fall on October 28.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level in Blatná, 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 Blatná experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.1 months, from November 4 to April 8, with average wind speeds of more than 9.1 miles per hour. The windiest day of the year is January 27, with an average hourly wind speed of 10.9 miles per hour.
The calmer time of year lasts for 6.9 months, from April 8 to November 4. The calmest day of the year is August 10, with an average hourly wind speed of 7.2 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Blatná is from the west throughout the year.
Best Time of Year to Visit
To characterize how pleasant the weather is in Blatná 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 Blatná for general outdoor tourist activities is from late June to late August, with a peak score in the first 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 Blatná for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.
The growing season in Blatná typically lasts for 5.9 months (180 days), from around April 21 to around October 18, rarely starting before April 4 or after May 9, and rarely ending before October 1 or after November 6.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Blatná should appear around April 30, only rarely appearing before April 17 or after May 13.
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 3.6 months, from April 30 to August 18, with an average daily incident shortwave energy per square meter above 5.4 kWh. The brightest day of the year is June 29, with an average of 6.6 kWh.
The darker period of the year lasts for 3.5 months, from October 28 to February 15, with an average daily incident shortwave energy per square meter below 2.0 kWh. The darkest day of the year is December 24, with an average of 0.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Blatná are 49.425 deg latitude, 13.882 deg longitude, and 1,522 ft elevation.
The topography within 2 miles of Blatná contains only modest variations in elevation, with a maximum elevation change of 358 feet and an average elevation above sea level of 1,478 feet. Within 10 miles contains only modest variations in elevation (1,086 feet). Within 50 miles contains very significant variations in elevation (4,137 feet).
The area within 2 miles of Blatná is covered by cropland (50%), trees (18%), grassland (14%), and artificial surfaces (14%), within 10 miles by cropland (59%) and trees (27%), and within 50 miles by trees (43%) and cropland (40%).
This report illustrates the typical weather in Blatná, 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 Blatná.
For each station, the records are corrected for the elevation difference between that station and Blatná 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 Blatná is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Blatná and a given station.
The stations contributing to this reconstruction are: Mariánské Lázně Airport (51%, 52 kilometers, northwest); Prague Václav Havel Airport (27%, 80 kilometers, north); Linz Airport (13%, 135 kilometers, south); and Krems-Langenlois Airport (9%, 170 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .