Climate averages 1991–2020
Lillestrøm weather
in August.
A mild, wet month: the 2nd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Lillestrøm: daytime highs average 19.6°C and nights cool to about 12.3°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 104 mm of rain on roughly 14 days, which makes August a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 15 h 39 min on an average August day.
The nearest other city in this atlas is Oslo (18 km away). In August its highs average 20.2°C, 0.6°C warmer than Lillestrøm, with 112 mm of rain.
Among the 8 cities listed in Norway, Lillestrøm ranks 4th of 8 for the warmest August highs and joint 3rd of 8 for the driest August (rainfall, lowest first). The mean August high of those 8 cities is 18.8°C; Lillestrøm is 0.8°C warmer than that mean.
From August to September, average highs fall by 4.6°C to 15.0°C, and monthly rainfall falls from 104 mm to 81 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Lillestrøm climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -2.0°C-6.9°C | -6.9°C | 65 | 10.4 | 6.87 h |
| February | -0.7°C-6.5°C | -6.5°C | 49 | 8.3 | 9.19 h |
| March | 3.6°C-3.5°C | -3.5°C | 49 | 8.0 | 11.812 h |
| April | 9.4°C0.7°C | 0.7°C | 53 | 9.0 | 14.515 h |
| May | 15.1°C5.8°C | 5.8°C | 74 | 11.5 | 17.117 h |
| June | 18.8°C10.2°C | 10.2°C | 91 | 11.9 | 18.719 h |
| July | 21.0°C13.0°C | 13.0°C | 94 | 12.6 | 18.018 h |
| August, selected | 19.6°C12.3°C | 12.3°C | 104 | 13.5 | 15.616 h |
| September | 15.0°C8.6°C | 8.6°C | 81 | 10.4 | 13.013 h |
| October | 8.5°C3.8°C | 3.8°C | 84 | 11.4 | 10.210 h |
| November | 3.3°C-0.3°C | -0.3°C | 84 | 11.6 | 7.68 h |
| December | -0.7°C-5.0°C | -5.0°C | 66 | 10.8 | 6.16 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Oslo in AugustNorway · 18 kmHigh 20.2°C · Low 13.2°C · 112 mm rain
- Drammen in AugustNorway · 53 kmHigh 20.3°C · Low 13.3°C · 104 mm rain
- Fredrikstad in AugustNorway · 82 kmHigh 19.7°C · Low 14.1°C · 86 mm rain
- Örebro in AugustSweden · 246 kmHigh 20.3°C · Low 13.3°C · 74 mm rain
- Gothenburg in AugustSweden · 256 kmHigh 20.0°C · Low 13.8°C · 118 mm rain
- Kristiansand in AugustNorway · 266 kmHigh 19.1°C · Low 13.3°C · 124 mm rain
- Borås in AugustSweden · 271 kmHigh 19.6°C · Low 12.9°C · 106 mm rain
- Jönköping in AugustSweden · 301 kmHigh 19.8°C · Low 13.6°C · 82 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Lillestrøm) is explained once on the Lillestrøm year overview and on the Sources, method and limits page.