Seveso, Italy experiences average highs of 18°C (64°F) and lows of 9°C (48°F) throughout the year. Rainfall is moderate, averaging about 12 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have warmed by 0.7°C (1.3°F) across the available records.
Seveso, Italy Weather & Climate 2026
Monthly climate averages for Seveso, Italy. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Apr–Sep At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.9/10
Best: May, June, July, August, September
UV Index
4
Low
Temperature 18°C / 9°C
Feels Like 17°C / 7°C
Rainy Days 12
Rainfall 123 mm
Sunshine 9 h
Humidity 74%
Wind Speed 10 km/h
Dew Point 9°C
Snow Days 4 days
Frost Days 11 days
Hottest Month
28°C
July
Avg Low19°C
Rain15days
Coldest Month
-1°C
January
Avg High8°C
Rain7days
Driest Month
6days
December
Avg High8°C
Avg Low0°C
Windiest Month
11 km/h
April (Gusts 29)
Worst Time to Visit
Consider avoiding January, February, December due to less favorable weather conditions.
Sun Position
Sunrise 05:35
Daylight 15.7h
Sunset 21:16
Live conditions—
Seveso on the map · live conditions
Seveso, Italy
- Continent
- Europe
- Country
- Italy
- City
- Seveso
- Population
- 22.7K
- Elevation
- 211 m
- Coordinates
- 45.65°, 9.14°
Seasonal Breakdown
Spring
Mar–May
Avg High 17°C
Avg Low 7°C
Rain 13 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 28°C
Avg Low 18°C
Rain 15 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 18°C
Avg Low 10°C
Rain 11 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 9°C
Avg Low 0°C
Rain 7 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 8°C / -1°C . Feb: 10°C / 1°C . Mar: 14°C / 3°C . Apr: 18°C / 7°C . May: 21°C / 12°C . Jun: 27°C / 17°C . Jul: 28°C / 19°C . Aug: 28°C / 19°C . Sep: 23°C / 15°C . Oct: 18°C / 10°C . Nov: 12°C / 5°C . Dec: 8°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 50 mm. Feb: 71 mm. Mar: 94 mm. Apr: 112 mm. May: 176 mm. Jun: 158 mm. Jul: 146 mm. Aug: 157 mm. Sep: 140 mm. Oct: 174 mm. Nov: 123 mm. Dec: 69 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 78%. Feb: 77%. Mar: 70%. Apr: 67%. May: 72%. Jun: 68%. Jul: 68%. Aug: 68%. Sep: 75%. Oct: 80%. Nov: 82%. Dec: 84%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 10 km/h . Feb: 9 km/h . Mar: 10 km/h . Apr: 11 km/h . May: 10 km/h . Jun: 10 km/h . Jul: 10 km/h . Aug: 9 km/h . Sep: 9 km/h . Oct: 9 km/h . Nov: 9 km/h . Dec: 9 km/h .
Sunshine
Sunshine
Sunshine: Jan: 6h. Feb: 7h. Mar: 9h. Apr: 10h. May: 11h. Jun: 13h. Jul: 13h. Aug: 12h. Sep: 10h. Oct: 7h. Nov: 6h. Dec: 6h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 2. Mar: UV 3. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 5 days. Feb: 5 days. Mar: 4 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 2 days. Dec: 4 days.
Climate Trends
Average highs have warmed by 0.7°C (1.3°F) across the available records. Average rainfall is trending wetter by about 10 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jun 2025 · 28°C | Jul · 28°C |
| Coldest month | Jan 2025 · 0°C | Jan · -1°C |
| Wettest month | Aug 2025 · 229 mm | May · 176 mm |
| Windiest month | Apr 2025 · 10 km/h | Apr · 11 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Fair April
Good May best
Wet June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 8°C / -1°C | 5°C / -4°C | 7days (50 mm) Good | 6.4h Fair | 78% Humid | 1.5 Low | Poor | View Details |
| February | 10°C / 1°C | 8°C / -2°C | 7days (71 mm) Good | 6.9h Fair | 77% Humid | 2.2 Moderate | Poor | View Details |
| March | 14°C / 3°C | 11°C / 1°C | 10days (94 mm) Wet | 8.5h Good | 70% Muggy | 3.4 Moderate | Fair | View Details |
| April | 18°C / 7°C | 16°C / 5°C | 12days (112 mm) Wet | 10.2h Excellent | 67% Muggy | 5.1 High | Good | View Details |
| May best | 21°C / 12°C | 21°C / 11°C | 18days (176 mm) Wet | 10.6h Excellent | 72% Muggy | 6 High | Wet | View Details |
| June best | 27°C / 17°C | 29°C / 17°C | 15days (158 mm) Wet | 12.5h Excellent | 68% Muggy | 6.7 High | Excellent | View Details |
| July best | 28°C / 19°C | 31°C / 20°C | 15days (146 mm) Wet | 12.6h Excellent | 68% Muggy | 6.9 High | Excellent | View Details |
| August best | 28°C / 19°C | 31°C / 20°C | 14days (157 mm) Wet | 11.7h Excellent | 68% Muggy | 6.1 High | Excellent | View Details |
| September best | 23°C / 15°C | 24°C / 15°C | 13days (140 mm) Wet | 9.7h Good | 75% Muggy | 4.6 Moderate | Excellent | View Details |
| October | 18°C / 10°C | 18°C / 9°C | 11days (174 mm) Wet | 7.2h Good | 80% Humid | 2.8 Moderate | Fair | View Details |
| November | 12°C / 5°C | 10°C / 2°C | 10days (123 mm) Wet | 5.9h Fair | 82% Humid | 2 Low | Fair | View Details |
| December | 8°C / 0°C | 6°C / -3°C | 6days (69 mm) Good | 5.5h Fair | 84% Humid | 1.4 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Seveso 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 Seveso, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Seveso is July, with average daytime highs of 28°C (83°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Seveso is January, with average overnight lows of -1°C (30°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Seveso is May, averaging 176mm of precipitation across 18 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Seveso runs through May, June, July, August, with the heaviest rainfall in May. Based on 10-year averages for Seveso.
Seveso receives approximately 108 sunshine hours per year. The sunniest month is July with around 13 hours. Based on climate data for Seveso.
The least favorable months to visit Seveso are January, February, December, primarily due to less favorable weather conditions. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Seveso is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Seveso is 74%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Seveso receives snow. Months with snowfall average 4 snow days and 5 cm (2 in) of accumulation, with about 11 frost days during winter.
Average wind speeds in Seveso are 10 km/h (6 mph). The windiest month is April with peak winds reaching 11 km/h (7 mph) (gusts up to 29 km/h / 18 mph).
Seveso averages 4 clear-sky days per month with overall cloud cover around 55%. The clearest skies occur in January.
The annual average dew point in Seveso is 9°C (48°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Seveso has a Humid Subtropical climate, classified as Cfa 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 Seveso ranges from 7°C (45°F) to 17°C (63°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Seveso. It earns a climate score of 7.8/10 with Excellent.
For June in Seveso, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 27°C (80°F) and 15 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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