Upplands Väsby, 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 683 mm of precipitation.
Temperature through the year
The normal daily high and low and the record for every date at Stockholm-Bromma, since 1947. The line marks today.
- Normal low
- Normal high
- Record high
- Record low
Normals for Sep 27
- Normal high
- 15°C
- Normal low
- 8°C
- Record high
- 22°Cin 2006
- Record low
- -4°Cin 1986
- Chance of a wet day
- 32%
- 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 | 1°C | -4°C | 12°C (2007) | -29°C (1979) | 47 mm | 9.3 |
| February | 1°C | -5°C | 13°C (1990) | -28°C (1966) | 40 mm | 8.5 |
| March | 5°C | -2°C | 18°C (1968) | -25°C (1951) | 40 mm | 9.3 |
| April | 11°C | 1°C | 27°C (1993) | -11°C (1955) | 45 mm | 9.0 |
| May | 16°C | 6°C | 29°C (1992) | -5°C (2017) | 50 mm | 9.3 |
| June | 20°C | 10°C | 32°C (1970) | 0°C (1955) | 78 mm | 12.0 |
| July | 23°C | 13°C | 34°C (1994) | 3°C (1975) | 74 mm | 12.4 |
| August | 22°C | 13°C | 35°C (1975) | 3°C (1973) | 71 mm | 12.4 |
| September | 17°C | 9°C | 28°C (1968) | -4°C (1986) | 60 mm | 9.0 |
| October | 10°C | 4°C | 21°C (1985) | -10°C (1992) | 62 mm | 12.4 |
| November | 5°C | 1°C | 15°C (2020) | -18°C (1965) | 60 mm | 12.0 |
| December | 2°C | -2°C | 13°C (2015) | -25°C (1989) | 56 mm | 12.4 |
| Year | 11°C | 4°C | 683 mm | 128 |
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.
683 mm in a normal year, most in June.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Upplands Väsby.
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 | -4°C | 96% | 100% | 0% | 0% | 0% | 0% | 0% |
| February | -4°C | 95% | 100% | 0% | 0% | 0% | 0% | 0% |
| March | -2°C | 89% | 100% | 0% | 0% | 0% | 0% | 0% |
| April | 2°C | 82% | 100% | 0% | 0% | 0% | 0% | 0% |
| May | 6°C | 77% | 99% | 1% | 0% | 0% | 0% | 0% |
| June | 10°C | 75% | 86% | 13% | 1% | 0% | 0% | 0% |
| July | 13°C | 73% | 52% | 38% | 10% | 1% | 0% | 0% |
| August | 13°C | 77% | 53% | 38% | 9% | 1% | 0% | 0% |
| September | 9°C | 82% | 91% | 9% | 1% | 0% | 0% | 0% |
| October | 5°C | 89% | 100% | 0% | 0% | 0% | 0% | 0% |
| November | 1°C | 95% | 100% | 0% | 0% | 0% | 0% | 0% |
| December | -2°C | 97% | 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 60 percent covered on average; the cloudiest is November, at 83 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 10.8 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 19, 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 Upplands Väsby 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 1947. 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 SWE00138894, 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.