🇳🇴 Weather in Tromsø in August
This is what the weather in Tromsø (Northern Norway, Norway) was like in August in 2017–2026.
Key facts at a glance
Avg. daytime high
14.6 °C
12.7 °C – 18.2 °C
Avg. night-time low
8.3 °C
6.9 °C – 11.1 °C
Avg. rain days in period
21.2
68 % of days · ≥ 1.0 mm
Avg. precipitation in period
141 mm
71.1 mm – 208 mm
Avg. sunshine per day
n/a
Sunshine duration is not available from this data source.
Avg. sea temperature
–
Sea temperature unavailable for today (daily limit).
Extremes: Highest temperature 27.0 °C (1 Aug 2025) · Lowest temperature 1.8 °C (31 Aug 2020) · Avg. daily peak wind 10 km/h
Weather mix of all days
- 14Sunny
- 33Partly cloudy
- 42Cloudy
- 115Light rain
- 97Rain
Summary
- On average 14.6 °C during the day and 8.3 °C at night.
- On average 21.2 rain days (Rain day = at least 1.0 mm of precipitation) with 141 mm of precipitation in total.
- Prevailing: Light rain.
- Warmest year: 2024 (avg. 18.2 °C), coolest: 2021 (avg. 12.7 °C).
- Wettest year: 2020 (208 mm), driest: 2019 (71.1 mm).
- Extremes: 27.0 °C on 1 Aug 2025 and 1.8 °C on 31 Aug 2020.
Overall values from all 10 years. How is this calculated?
Charts
Temperatures per year
Average over your travel period
Precipitation & rain days
Year by year
2026
Avg. max13.1°Avg. min7.7°- Rain days
- 22 Rain days
- Precipitation
- 127 mm
- Avg. sunshine per day
- n/a
- Sea temperature
- –
Max 18.2 °C · Min 4.4 °C
2025
Avg. max14.8°Avg. min8.8°- Rain days
- 22 Rain days
- Precipitation
- 180 mm
- Avg. cloud cover
- 72 % cloudy
- Sea temperature
- –
Max 27.0 °C · Min 3.7 °C
2024
Avg. max18.2°Avg. min11.1°- Rain days
- 20 Rain days
- Precipitation
- 138 mm
- Avg. cloud cover
- 70 % cloudy
- Sea temperature
- –
Max 25.9 °C · Min 6.9 °C
2023
Avg. max17.0°Avg. min10.0°- Rain days
- 16 Rain days
- Precipitation
- 81.5 mm
- Avg. cloud cover
- 74 % cloudy
- Sea temperature
- –
Max 25.0 °C · Min 5.7 °C
2022
Avg. max14.9°Avg. min8.3°- Rain days
- 26 Rain days
- Precipitation
- 189 mm
- Avg. cloud cover
- 83 % cloudy
- Sea temperature
- –
Max 22.3 °C · Min 3.8 °C
2021
Avg. max12.7°Avg. min7.1°- Rain days
- 21 Rain days
- Precipitation
- 109 mm
- Avg. cloud cover
- 85 % cloudy
- Sea temperature
- –
Max 21.7 °C · Min 4.3 °C
2020
Avg. max13.3°Avg. min7.5°- Rain days
- 25 Rain days
- Precipitation
- 208 mm
- Avg. cloud cover
- 82 % cloudy
- Sea temperature
- –
Max 20.7 °C · Min 1.8 °C
2019
Avg. max15.1°Avg. min8.3°- Rain days
- 14 Rain days
- Precipitation
- 71.1 mm
- Avg. cloud cover
- 76 % cloudy
- Sea temperature
- –
Max 19.8 °C · Min 4.5 °C
2018
Avg. max13.8°Avg. min7.7°- Rain days
- 25 Rain days
- Precipitation
- 163 mm
- Avg. cloud cover
- 88 % cloudy
- Sea temperature
- –
Max 25.2 °C · Min 4.5 °C
2017
Avg. max13.2°Avg. min6.9°- Rain days
- 21 Rain days
- Precipitation
- 138 mm
- Avg. cloud cover
- 87 % cloudy
- Sea temperature
- –
Max 18.4 °C · Min 2.5 °C
Frequently asked questions
- How warm is it in Tromsø in August?
- Daytime highs averaged 14.6 °C, night-time lows 8.3 °C. The highest value of the past 10 years was 27.0 °C (1 Aug 2025), the lowest 1.8 °C (31 Aug 2020).
- How often does it rain in Tromsø in August?
- On average there were 21.2 rain days (at least 1 mm) with 141 mm of precipitation in total.
Check your exact travel dates
Choose your travel period – we show the weather for exactly those days.
Other destinations in August
Data sources
- Weather data
- Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains. - Sea temperature
- MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis) - Place search
- Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)