Barkarö, Sweden Climate
The warmest month is July, with an average high of 23°C; the coldest is February, with an average low of -5°C. A normal year brings 577 mm of precipitation.
Temperature through the year
The normal daily high and low and the record for every date at Vasteras-Hasslo, since 1858. The line marks today.
- Normal low
- Normal high
- Record high
- Record low
Normals for Sep 27
- Normal high
- 14°C
- Normal low
- 7°C
- Record high
- 21°Cin 1938
- Record low
- -3°Cin 1939
- Chance of a wet day
- 36%
- Daylight
- 11 h 49 min
Month by month
Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.
| Month | Avg high | Avg low | Record high | Record low | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 0°C | -5°C | 11°C (1882) | -31°C (1918) | 37 mm | 9.3 |
| February | 1°C | -5°C | 12°C (2021) | -32°C (1979) | 30 mm | 11.3 |
| March | 5°C | -3°C | 19°C (2017) | -28°C (1888) | 28 mm | 9.3 |
| April | 11°C | 1°C | 26°C (1993) | -17°C (1944) | 32 mm | 9.0 |
| May | 16°C | 6°C | 30°C (1894) | -6°C (1918) | 42 mm | 12.4 |
| June | 20°C | 10°C | 35°C (1947) | -1°C (1941) | 63 mm | 15.0 |
| July | 23°C | 13°C | 36°C (1933) | 2°C (1908) | 72 mm | 15.5 |
| August | 22°C | 12°C | 35°C (1975) | 0°C (1889) | 72 mm | 15.5 |
| September | 16°C | 8°C | 28°C (2024) | -7°C (2001) | 45 mm | 12.0 |
| October | 10°C | 4°C | 21°C (1898) | -12°C (1911) | 56 mm | 12.4 |
| November | 5°C | 0°C | 16°C (2020) | -19°C (1904) | 53 mm | 12.0 |
| December | 2°C | -3°C | 12°C (2015) | -27°C (1927) | 48 mm | 12.4 |
| Year | 11°C | 3°C | 577 mm | 146 |
Precipitation
Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.
577 mm in a normal year, most in July.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Barkarö.
The muggiest month is July, when 1 percent of days are muggy or worse, with a mean dew point of 18°C or more.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | -5°C | 97% | 100% | 0% | 0% | 0% | 0% | 0% |
| February | -4°C | 96% | 100% | 0% | 0% | 0% | 0% | 0% |
| March | -2°C | 90% | 100% | 0% | 0% | 0% | 0% | 0% |
| April | 2°C | 82% | 100% | 0% | 0% | 0% | 0% | 0% |
| May | 6°C | 77% | 96% | 4% | 0% | 0% | 0% | 0% |
| June | 10°C | 75% | 83% | 15% | 2% | 0% | 0% | 0% |
| July | 13°C | 75% | 48% | 38% | 12% | 1% | 0% | 0% |
| August | 12°C | 78% | 54% | 36% | 10% | 1% | 0% | 0% |
| September | 9°C | 83% | 91% | 8% | 1% | 0% | 0% | 0% |
| October | 5°C | 91% | 100% | 0% | 0% | 0% | 0% | 0% |
| November | 0°C | 96% | 100% | 0% | 0% | 0% | 0% | 0% |
| December | -3°C | 98% | 100% | 0% | 0% | 0% | 0% | 0% |
Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.
Clouds
Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.
The clearest month is July, with the sky 66 percent covered on average; the cloudiest is January, at 77 percent.
Wind
The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.
The windiest month is January, averaging 9.0 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 20, with 18 h 42 min of daylight; the shortest is Dec 18, with 6 h 01 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in Barkarö in each month, day by day.
What this means
A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.
A record is the highest or lowest value on the date in every year the station has reported, back to 1858. It rests on one station, so a neighbor a few miles away can hold different ones.
Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.
More for this place
Nearby
Sources
Records: NOAA GHCN-Daily, station SWE00139028, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.