Jönåker, Sweden experiences average highs of 11°C (52°F) and lows of 6°C (43°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Average highs have warmed by 0.8°C (1.4°F) across the available records.
Jönåker, Sweden Weather & Climate 2026
Monthly climate averages for Jönåker, Sweden. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.4/10
Best: May, June, July, August, September
UV Index
3
Low
Temperature 11°C / 6°C
Feels Like 8°C / 3°C
Rainy Days 10
Rainfall 51 mm
Sunshine 8 h
Humidity 79%
Wind Speed 21 km/h
Dew Point 5°C
Snow Days 7 days
Frost Days 13 days
Hottest Month
21°C
July
Avg Low 15°C
Rain 11 days
Coldest Month
-2°C
January
Avg High 1°C
Rain 10 days
Driest Month
7 days
April
Avg High 9°C
Avg Low 3°C
Windiest Month
24 km/h
January (Gusts 41)
Sea Temperature
0°C – 20°C
Warmest water: July (
20°C
)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures.
Sun Position
Sunrise 04:08
Daylight 17.7h
Sunset 21:49
Live conditions —
Jönåker on the map · live conditions
Jönåker, Sweden
- Continent
- Europe
- Country
- Sweden
- City
- Jönåker
- Population
- 598
- Coordinates
- 58.74°, 16.72°
Seasonal Breakdown
Spring
Mar–May
Avg High 10°C
Avg Low 3°C
Rain 8 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 20°C
Avg Low 14°C
Rain 10 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 11°C
Avg Low 7°C
Rain 10 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 2°C
Avg Low -1°C
Rain 10 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: 1°C / -2°C . Feb: 2°C / -2°C . Mar: 5°C / 0°C . Apr: 9°C / 3°C . May: 15°C / 8°C . Jun: 20°C / 13°C . Jul: 21°C / 15°C . Aug: 20°C / 15°C . Sep: 17°C / 12°C . Oct: 11°C / 7°C . Nov: 6°C / 3°C . Dec: 3°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 51 mm. Feb: 35 mm. Mar: 36 mm. Apr: 29 mm. May: 44 mm. Jun: 47 mm. Jul: 66 mm. Aug: 73 mm. Sep: 54 mm. Oct: 73 mm. Nov: 54 mm. Dec: 54 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 86%. Feb: 83%. Mar: 78%. Apr: 71%. May: 69%. Jun: 70%. Jul: 73%. Aug: 77%. Sep: 80%. Oct: 84%. Nov: 88%. Dec: 88%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 24 km/h . Feb: 23 km/h . Mar: 21 km/h . Apr: 20 km/h . May: 19 km/h . Jun: 19 km/h . Jul: 18 km/h . Aug: 19 km/h . Sep: 20 km/h . Oct: 23 km/h . Nov: 22 km/h . Dec: 23 km/h .
Sunshine
Sunshine
Sunshine: Jan: 2h. Feb: 5h. Mar: 7h. Apr: 10h. May: 13h. Jun: 14h. Jul: 13h. Aug: 11h. Sep: 8h. Oct: 5h. Nov: 2h. Dec: 1h.
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: 0°C . Feb: 0°C . Mar: 1°C . Apr: 5°C . May: 12°C . Jun: 18°C . Jul: 20°C . Aug: 19°C . Sep: 17°C . Oct: 11°C . Nov: 5°C . Dec: 1°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 1. Mar: UV 3. Apr: UV 4. May: UV 5. Jun: UV 6. Jul: UV 5. Aug: UV 4. Sep: UV 3. Oct: UV 2. 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: 11 days. Feb: 9 days. Mar: 6 days. Apr: 3 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 3 days. Dec: 8 days.
Climate Trends
Average highs have warmed by 0.8°C (1.4°F) across the available records. Average rainfall is trending wetter by about 11 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 22°C | Jul · 21°C |
| Coldest month | Feb 2025 · -2°C | Jan · -2°C |
| Wettest month | Jul 2025 · 123 mm | Aug · 73 mm |
| Windiest month | Jan 2025 · 25 km/h | Jan · 24 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May best
Good June best
Excellent July best
Excellent August best
Excellent September best
Good October
Poor November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 1°C / -2°C | -3°C / -7°C | 10days (51 mm) Wet | 2.2h Poor | 86% Very Muggy | 0.5 Low | Poor | View Details |
| February | 2°C / -2°C | -2°C / -7°C | 9days (35 mm) Wet | 4.5h Fair | 83% Humid | 1.1 Low | Poor | View Details |
| March | 5°C / 0°C | 1°C / -5°C | 8days (36 mm) Wet | 7h Good | 78% Humid | 2.5 Moderate | Poor | View Details |
| April | 9°C / 3°C | 5°C / -2°C | 7days (29 mm) Good | 10.4h Excellent | 71% Muggy | 3.5 Moderate | Poor | View Details |
| May best | 15°C / 8°C | 12°C / 5°C | 8days (44 mm) Wet | 12.8h Excellent | 69% Muggy | 5 Moderate | Good | View Details |
| June best | 20°C / 13°C | 18°C / 11°C | 9days (47 mm) Wet | 13.8h Excellent | 70% Muggy | 5.5 High | Excellent | View Details |
| July best | 21°C / 15°C | 21°C / 14°C | 11days (66 mm) Wet | 13.4h Excellent | 73% Muggy | 5.2 High | Excellent | View Details |
| August best | 20°C / 15°C | 19°C / 13°C | 11days (73 mm) Wet | 11.1h Excellent | 77% Humid | 4.4 Moderate | Excellent | View Details |
| September best | 17°C / 12°C | 15°C / 10°C | 9days (54 mm) Wet | 8.4h Good | 80% Humid | 3.2 Moderate | Good | View Details |
| October | 11°C / 7°C | 8°C / 3°C | 12days (73 mm) Wet | 4.9h Fair | 84% Humid | 1.5 Low | Poor | View Details |
| November | 6°C / 3°C | 2°C / -1°C | 10days (54 mm) Wet | 2.4h Poor | 88% Very Muggy | 0.7 Low | Poor | View Details |
| December | 3°C / 0°C | -1°C / -5°C | 12days (54 mm) Wet | 1.4h Poor | 88% Very Muggy | 0.3 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Jönåker are May, June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Jönåker, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Jönåker is July, with average daytime highs of 21°C (70°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Jönåker is January, with average overnight lows of -2°C (28°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Jönåker is August, averaging 73mm of precipitation across 11 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Jönåker runs through October, December, July, August, with the heaviest rainfall in October. Based on 10-year averages for Jönåker.
Jönåker receives approximately 92 sunshine hours per year. The sunniest month is June with around 14 hours. Based on climate data for Jönåker.
The least favorable months to visit Jönåker are January, February, March, December, primarily due to very cold temperatures. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Jönåker is 3, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Jönåker is 79%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 9°C (48°F), which most swimmers will find too cold without a wetsuit.
Yes, Jönåker receives snow. Months with snowfall average 7 snow days and 9 cm (4 in) of accumulation, with about 13 frost days during winter.
Average wind speeds in Jönåker are 21 km/h (13 mph). The windiest month is January with peak winds reaching 24 km/h (15 mph) (gusts up to 41 km/h / 25 mph).
Jönåker averages 3 clear-sky days per month with overall cloud cover around 65%. The clearest skies occur in May.
The annual average dew point in Jönåker is 5°C (41°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Jönåker has a Oceanic climate, classified as Cfb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Jönåker ranges from 3°C (37°F) to 8°C (46°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 Jönåker. It earns a climate score of 7.9/10 with Excellent.
For July in Jönåker, pack Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 21°C (70°F) and 11 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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