Os, Norway experiences average highs of 5°C (41°F) and lows of -1°C (30°F) throughout the year. Rainfall is frequent, averaging about 13 rainy days per month. Average highs have warmed by 1.5°C (2.7°F) across the available records.
Os, Norway Weather & Climate 2026
Monthly climate averages for Os, Norway. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
2.9/10
Best: June, July, August
UV Index
3
Low
Temperature 5°C / -1°C
Feels Like 2°C / -5°C
Rainy Days 13
Rainfall 65 mm
Sunshine 7 h
Humidity 83%
Wind Speed 15 km/h
Dew Point -1°C
Snow Days 13 days
Frost Days 22 days
Hottest Month
17°C
July
Avg Low 9°C
Rain 17 days
Coldest Month
-10°C
January
Avg High -5°C
Rain 13 days
Driest Month
10 days
February
Avg High -4°C
Avg Low -9°C
Windiest Month
16 km/h
March (Gusts 43)
Worst Time to Visit
Consider avoiding January, October, November, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 03:52
Daylight 19h
Sunset 22:49
Live conditions —
Os on the map · live conditions
Os, Norway
- Continent
- Europe
- Country
- Norway
- City
- Os
- Population
- 672
- Coordinates
- 62.50°, 11.22°
Seasonal Breakdown
Spring
Mar–May
Avg High 5°C
Avg Low -3°C
Rain 13 days/mo
Summer
Jun–Aug
Avg High 16°C
Avg Low 8°C
Rain 15 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 5°C
Avg Low 0°C
Rain 13 days/mo
Winter
Dec–Feb
Avg High -4°C
Avg Low -10°C
Rain 12 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: -5°C / -10°C . Feb: -4°C / -9°C . Mar: 0°C / -7°C . Apr: 4°C / -4°C . May: 10°C / 2°C . Jun: 16°C / 7°C . Jul: 17°C / 9°C . Aug: 15°C / 8°C . Sep: 11°C / 5°C . Oct: 5°C / 0°C . Nov: -1°C / -6°C . Dec: -4°C / -9°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 53 mm. Feb: 35 mm. Mar: 46 mm. Apr: 49 mm. May: 62 mm. Jun: 87 mm. Jul: 105 mm. Aug: 105 mm. Sep: 74 mm. Oct: 68 mm. Nov: 47 mm. Dec: 52 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 87%. Feb: 86%. Mar: 82%. Apr: 78%. May: 75%. Jun: 74%. Jul: 78%. Aug: 82%. Sep: 86%. Oct: 90%. Nov: 91%. Dec: 89%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 16 km/h . Feb: 15 km/h . Mar: 16 km/h . Apr: 15 km/h . May: 15 km/h . Jun: 16 km/h . Jul: 14 km/h . Aug: 15 km/h . Sep: 16 km/h . Oct: 16 km/h . Nov: 14 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 1h. Feb: 4h. Mar: 7h. Apr: 11h. May: 12h. Jun: 12h. Jul: 11h. Aug: 9h. Sep: 6h. Oct: 4h. Nov: 2h. Dec: 1h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 0. Feb: UV 1. Mar: UV 3. Apr: UV 4. May: UV 5. Jun: UV 5. Jul: UV 5. Aug: UV 4. Sep: UV 2. Oct: UV 1. Nov: UV 1. Dec: UV 0.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow Days Snowfall
Snow Days: Jan: 20 days. Feb: 17 days. Mar: 20 days. Apr: 17 days. May: 9 days. Jun: 1 days. Jul: 0 days. Aug: 0 days. Sep: 2 days. Oct: 12 days. Nov: 15 days. Dec: 20 days.
Climate Trends
Average highs have warmed by 1.5°C (2.7°F) across the available records. Average rainfall is trending wetter by about 12 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 21°C | Jul · 17°C |
| Coldest month | Feb 2025 · -10°C | Jan · -10°C |
| Wettest month | Jun 2025 · 118 mm | Jul · 105 mm |
| Windiest month | May 2025 · 18 km/h | Mar · 16 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May
Poor June best
Fair July best
Good August best
Fair September
Fair October
Poor November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -5°C / -10°C | -10°C / -15°C | 13days (53 mm) Wet | 1.2h Poor | 87% Very Muggy | 0.4 Low | Poor | View Details |
| February | -4°C / -9°C | -9°C / -14°C | 10days (35 mm) Wet | 4.2h Fair | 86% Very Muggy | 1.3 Low | Poor | View Details |
| March | 0°C / -7°C | -5°C / -11°C | 13days (46 mm) Wet | 7.2h Good | 82% Humid | 2.7 Moderate | Poor | View Details |
| April | 4°C / -4°C | 0°C / -8°C | 13days (49 mm) Wet | 10.5h Excellent | 78% Humid | 4 Moderate | Poor | View Details |
| May | 10°C / 2°C | 7°C / -2°C | 14days (62 mm) Wet | 11.7h Excellent | 75% Muggy | 4.6 Moderate | Poor | View Details |
| June best | 16°C / 7°C | 14°C / 5°C | 14days (87 mm) Wet | 11.9h Excellent | 74% Muggy | 5.1 High | Fair | View Details |
| July best | 17°C / 9°C | 15°C / 7°C | 17days (105 mm) Wet | 10.9h Excellent | 78% Humid | 4.5 Moderate | Good | View Details |
| August best | 15°C / 8°C | 13°C / 6°C | 15days (105 mm) Wet | 8.8h Good | 82% Humid | 3.7 Moderate | Fair | View Details |
| September | 11°C / 5°C | 9°C / 3°C | 14days (74 mm) Wet | 5.9h Fair | 86% Very Muggy | 2.4 Moderate | Fair | View Details |
| October | 5°C / 0°C | 1°C / -3°C | 14days (68 mm) Wet | 4h Fair | 90% Very Muggy | 1.2 Low | Poor | View Details |
| November | -1°C / -6°C | -5°C / -10°C | 11days (47 mm) Wet | 1.5h Poor | 91% Very Muggy | 0.5 Low | Poor | View Details |
| December | -4°C / -9°C | -8°C / -13°C | 13days (52 mm) Wet | 0.5h Poor | 89% Very Muggy | 0.2 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Os are June, July, August, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Os, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Os is July, with average daytime highs of 17°C (62°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Os is January, with average overnight lows of -10°C (13°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Os is July, averaging 105mm of precipitation across 17 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Os runs through July, August, May, June, with the heaviest rainfall in July. Based on 10-year averages for Os.
Os receives approximately 78 sunshine hours per year. The sunniest month is June with around 12 hours. Based on climate data for Os.
The least favorable months to visit Os are January, October, November, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider June, July, August instead.
The annual average UV index in Os is 3, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Os is 83%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Yes, Os receives snow. Months with snowfall average 13 snow days and 23 cm (9 in) of accumulation, with about 22 frost days during winter.
Average wind speeds in Os are 15 km/h (9 mph). The windiest month is March with peak winds reaching 16 km/h (10 mph) (gusts up to 43 km/h / 26 mph).
Os averages 1 clear-sky days per month with overall cloud cover around 80%. The clearest skies occur in April.
The annual average dew point in Os is -1°C (30°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Os has a Subarctic climate, classified as Dfc under the Köppen system. Continental climates experience extreme temperature ranges — hot summers and cold, snowy winters.
The 'feels like' temperature in Os ranges from -5°C (23°F) to 2°C (36°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, July is a great time to visit Os. It earns a climate score of 6.5/10 with Good.
For July in Os, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. With average highs of 17°C (62°F) and 17 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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