Average Weather in Locarno Switzerland
In Locarno, the summers are warm and wet, the winters are very cold, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 27°F to 80°F and is rarely below 20°F or above 87°F.
Based on the tourism score, the best time of year to visit Locarno for warm-weather activities is from mid June to mid September.
The warm season lasts for 3.2 months, from June 3 to September 10, with an average daily high temperature above 72°F. The hottest day of the year is July 25, with an average high of 80°F and low of 62°F.
The cold season lasts for 3.1 months, from November 20 to February 24, with an average daily high temperature below 49°F. The coldest day of the year is January 12, with an average low of 27°F and high of 41°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 Locarno, 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 Locarno begins around June 18 and lasts for 3.0 months, ending around September 17. On July 21, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.
The cloudier part of the year begins around September 17 and lasts for 9.0 months, ending around June 18. On May 8, the cloudiest day of the year, the sky is overcast or mostly cloudy 59% of the time, and clear, mostly clear, or partly cloudy 41% 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 Locarno varies throughout the year.
The wetter season lasts 6.2 months, from April 4 to October 10, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 43% on May 26.
The drier season lasts 5.8 months, from October 10 to April 4. The smallest chance of a wet day is 18% on March 5.
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 43% on May 26.
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. Locarno experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Locarno. The most rain falls during the 31 days centered around May 21, with an average total accumulation of 4.6 inches.
The least rain falls around January 26, with an average total accumulation of 1.4 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. Locarno experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 2.9 months, from November 30 to February 25, 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 13, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 9.1 months, from February 25 to November 30. The least snow falls around July 22, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Locarno varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 37 minutes of daylight; the longest day is June 21, with 15 hours, 47 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:32 AM on June 16, and the latest sunrise is 2 hours, 35 minutes later at 8:07 AM on January 1. The earliest sunset is at 4:38 PM on December 11, and the latest sunset is 4 hours, 42 minutes later at 9:20 PM on June 26.
Daylight saving time (DST) is observed in Locarno 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
Locarno experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 2.8 months, from June 14 to September 7, during which time the comfort level is muggy, oppressive, or miserable at least 5% of the time. The muggiest day of the year is July 27, with muggy conditions 20% of the time.
The least muggy day of the year is March 5, when muggy conditions are essentially unheard of.
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 Locarno experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 3.6 months, from February 17 to June 5, with average wind speeds of more than 4.1 miles per hour. The windiest day of the year is March 31, with an average hourly wind speed of 4.7 miles per hour.
The calmer time of year lasts for 8.4 months, from June 5 to February 17. The calmest day of the year is August 11, with an average hourly wind speed of 3.6 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Locarno varies throughout the year.
The wind is most often from the south for 2.8 months, from April 26 to July 19 and for 3.9 weeks, from July 30 to August 26, with a peak percentage of 47% on May 25. The wind is most often from the north for 1.6 weeks, from July 19 to July 30 and for 8.0 months, from August 26 to April 26, with a peak percentage of 41% on July 23.
Best Time of Year to Visit
To characterize how pleasant the weather is in Locarno 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 Locarno for general outdoor tourist activities is from mid June to mid September, 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 Locarno for hot-weather activities is from early July to mid 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 Locarno typically lasts for 7.5 months (230 days), from around March 23 to around November 8, rarely starting before March 2 or after April 16, and rarely ending before October 19 or after November 26.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Locarno should appear around April 6, only rarely appearing before March 23 or after April 21.
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 3.2 months, from May 13 to August 18, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is July 6, with an average of 6.9 kWh.
The darker period of the year lasts for 3.4 months, from October 25 to February 9, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest day of the year is December 16, with an average of 1.5 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Locarno are 46.171 deg latitude, 8.800 deg longitude, and 787 ft elevation.
The topography within 2 miles of Locarno contains extreme variations in elevation, with a maximum elevation change of 4,423 feet and an average elevation above sea level of 1,368 feet. Within 10 miles also contains extreme variations in elevation (7,385 feet). Within 50 miles also contains extreme variations in elevation (14,701 feet).
The area within 2 miles of Locarno is covered by artificial surfaces (37%), trees (34%), and water (21%), within 10 miles by trees (63%), and within 50 miles by trees (40%) and grassland (16%).
This report illustrates the typical weather in Locarno, 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 Locarno.
For each station, the records are corrected for the elevation difference between that station and Locarno 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 Locarno is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Locarno and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .