Average Weather in April in Sainte-Hélène-sur-Isère France
Daily high temperatures increase by 7°F, from 55°F to 63°F, rarely falling below 46°F or exceeding 73°F.
Daily low temperatures increase by 6°F, from 38°F to 44°F, rarely falling below 31°F or exceeding 50°F.
For reference, on August 4, the hottest day of the year, temperatures in Sainte-Hélène-sur-Isère typically range from 58°F to 79°F, while on January 12, the coldest day of the year, they range from 27°F to 40°F.
Average High and Low Temperature in April
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. The horizontal axis is the day, 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 April
The month of April in Sainte-Hélène-sur-Isère experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 55% throughout the month.
The clearest day of the month is April 7, with clear, mostly clear, or partly cloudy conditions 47% of the time.
For reference, on May 8, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 59%, while on July 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%.
Cloud Cover Categories in April
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. In Sainte-Hélène-sur-Isère, the chance of a wet day over the course of April is essentially constant, remaining around 30% throughout.
For reference, the year's highest daily chance of a wet day is 38% on May 25, and its lowest chance is 23% on March 5.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Sainte-Hélène-sur-Isère is essentially constant, remaining about 2.6 inches throughout, and rarely exceeding 4.7 inches or falling below 0.7 inches.
Average Monthly Rainfall in April
Over the course of April in Sainte-Hélène-sur-Isère, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 28 minutes, implying an average daily increase of 3 minutes, 3 seconds, and weekly increase of 21 minutes, 20 seconds.
The shortest day of the month is April 1, with 12 hours, 47 minutes of daylight and the longest day is April 30, with 14 hours, 16 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Sainte-Hélène-sur-Isère is 7:15 AM on April 1 and the earliest sunrise is 51 minutes earlier at 6:24 AM on April 30.
The earliest sunset is 8:02 PM on April 1 and the latest sunset is 38 minutes later at 8:40 PM on April 30.
Daylight saving time is observed in Sainte-Hélène-sur-Isère during 2018, but it neither starts nor ends during April, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:45 AM and sets 15 hours, 42 minutes later, at 9:27 PM, while on December 21, the shortest day of the year, it rises at 8:12 AM and sets 8 hours, 41 minutes later, at 4:53 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The chance that a given day will be muggy in Sainte-Hélène-sur-Isère is essentially constant during April, remaining around 0% throughout.
For reference, on July 25, the muggiest day of the year, there are muggy conditions 1% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in April
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Sainte-Hélène-sur-Isère is essentially constant during April, remaining within 0.1 miles per hour of 4.0 miles per hour throughout.
For reference, on April 3, the windiest day of the year, the daily average wind speed is 4.1 miles per hour, while on August 12, the calmest day of the year, the daily average wind speed is 3.6 miles per hour.
The highest daily average wind speed during April is 4.1 miles per hour on April 3.
Average Wind Speed in April
Wind Direction in April
The growing season in Sainte-Hélène-sur-Isère typically lasts for 7.0 months (213 days), from around April 6 to around November 5, rarely starting before March 16 or after April 26, and rarely ending before October 16 or after November 27.
During April in Sainte-Hélène-sur-Isère, the chance that a given day is within the growing season is very rapidly increasing rising from 38% to 95% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in April
The average accumulated growing degree days in Sainte-Hélène-sur-Isère are gradually increasing during April, increasing by 101°F, from 38°F to 139°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Sainte-Hélène-sur-Isère is gradually increasing during April, rising by 1.0 kWh, from 4.8 kWh to 5.8 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in April
For the purposes of this report, the geographical coordinates of Sainte-Hélène-sur-Isère are 45.613 deg latitude, 6.321 deg longitude, and 1,703 ft elevation.
The topography within 2 miles of Sainte-Hélène-sur-Isère contains large variations in elevation, with a maximum elevation change of 3,107 feet and an average elevation above sea level of 1,568 feet. Within 10 miles contains large variations in elevation (7,838 feet). Within 50 miles also contains extreme variations in elevation (15,115 feet).
The area within 2 miles of Sainte-Hélène-sur-Isère is covered by cropland (42%), trees (38%), and artificial surfaces (15%), within 10 miles by trees (60%) and grassland (15%), and within 50 miles by trees (37%) and grassland (21%).
This report illustrates the typical weather in Sainte-Hélène-sur-Isère year round, 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 Sainte-Hélène-sur-Isère.
For each station, the records are corrected for the elevation difference between that station and Sainte-Hélène-sur-Isère 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 Sainte-Hélène-sur-Isère is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sainte-Hélène-sur-Isère and a given station.
The stations contributing to this reconstruction are: Chambéry Airport (37%, 34 kilometers, west); Annecy-Meythet (44%, 39 kilometers, northwest); Aosta Airport (15%, 81 kilometers, east); and Château-Arnoux-Saint-Auban Airport (4.7%, 174 kilometers, south).
Time zones for aiports and weather stations are provided by AskGeo.com .