Janesville climate
Janesville offers cool summers and a serious Wisconsin winter
The current rows show a 2.6 out of 5 overall comfort score, a 4.8 summer feel, and a 1.0 winter feel. The average summer high is 81°F, with four days above 90°F. The average winter low is 15°F / -9°C, with 152 days below freezing. Five months fall within the comfort window, humidity is 80%, solar exposure is 1,423 peak-sun hours per year, and air quality is rated 4.7 out of 5 with a 6.0 µg/m³ modeled fine-particle average.
May through September are the best months; December through February are the toughest. Allergy levels are Poor, heat risk is Low, drought risk is Low, and weather volatility is 3.1 out of 5. NOAA normals show annual snow near 36.6 inches, January lows near 11.6°F, and July highs near 83.4°F. Heating, snow, ice, daylight, pipes, indoor life, and winter transport should shape the home visit.
Living through the seasons
Summers are the easier season. Winter comfort deserves a closer look.
- Overall Comfort
- Good
2.6 / 5
- Average Summer High
- 81°F
- Days Above 90°F
- 4 days/year
- Summer Feel
- Excellent
Mild · 81°F
Excellent
4.8 / 5
- Average Winter Low
- 15°F / -9°C
- Days Below Freezing
- 152 days/year
- Winter Feel
- Poor
Poor
Poor
1 / 5
The shape of the year
Humidity, comfortable months, and sunshine show how the seasons differ.
- Humidity
- 80%
- Comfortable Months
- 5 months
- Solar Exposure
- 1423 peak sun hrs/yr
Good
Fair
Poor
Air, allergies, and weather
Air quality and allergies shape day to day comfort. The best months and weather risks help with timing.
Air and allergies
- Air Quality
- Excellent
- Allergy Levels
- Poor
4.7 / 5
Current AQI
Checking…
Current PM2.5
Checking…
Timing and weather
- Long Term Fine Particle Pollution
- 6 µg/m³ 2021-2025 modeled average
- Best Months
- May, Jun, Jul, Aug, Sep
- Toughest Months
- Feb, Jan, Dec
- Heat Risk
- Low
- Drought Risk
- Low
- Weather Volatility
- Moderate
Good · 6 µg/m³ 2021-2025 modeled average
Very Good
3.1 / 5
Janesville in everyday life
Could Janesville work for you?
What may work well
- An 81°F average summer high, four hot days, and Low heat risk support cool-season outdoor life.
- Parks, gardens, trails, libraries, history, senior programs, and indoor culture provide winter alternatives.
- NOAA, city, county, and ReadyWisconsin sources support practical preparation.
What to think about
- A 15°F / -9°C average winter low, 152 freezing days, and 80% humidity make winter work substantial.
- Allergy levels are Poor, storm risk is High, and flood risk is Moderate.
- Heating, pipes, snow, ice, basement, power, and sidewalks can change lived comfort.
Choose a Janesville home that makes winter usable
Inspect heating and insulation
Check heating type, energy bills, windows, insulation, hot water, damp, pipes, ventilation, and a warm room for colder days.
Review footing and snow
Walk the entry, sidewalks, crossings, slope, transit stop, pharmacy, and grocery route. Note ice, snow, lighting, benches, and clearance.
Plan the toughest months
Keep indoor, library, garden, senior-center, museum, and social options ready for December through February, alongside food, medicines, heating, and transport.
Use local observations
Compare the home with NOAA normals, weather radio, flood maps, and current warnings without replacing the catalog rows or assuming one station describes every block.
Questions retirees ask
What is Janesville's climate like for retirement?
The current rows show an 81°F average summer high, four days above 90°F, a 15°F / -9°C average winter low, 152 freezing days, 80% humidity, and five comfortable months.
Is Janesville too cold in winter?
That depends on heating, mobility, cold tolerance, and daily plans. The winter rows are demanding, so inspect heat, insulation, pipes, snow, sidewalks, daylight, and indoor options.
What should a home inspection include?
Check heating, windows, insulation, basement, damp, pipes, roof, drainage, snow clearance, ice, power, floodplain, and the route to care during winter.
When is the easiest period to visit?
The current rows name May through September as the best months. December through February are the toughest, so visit beyond summer if winter housing is a concern.
Janesville offers a cool summer and a strong winter commitment. Visit beyond the warm season, price heating and snow, inspect pipes and footing, and see whether the household can make the cold months ordinary.
Sources
Climate comfort helps estimate how practical daily life may feel across the year, especially for heat, humidity, cold, and seasonal constraints.
Seasonal timing, health conditions, air conditioning, air quality, and elevation can change the lived experience.
- NASA POWER
Used for Overall Comfort, Summer Feel, Average Summer High, Days Above 90°F, Winter Feel, Average Winter Low, Days Below Freezing, Humidity, Comfortable Months, Solar Exposure, Best Months, Toughest Months, Allergy Levels, Heat Risk, Weather Volatility
- Open-Meteo / Copernicus CAMS, checked against U.S. EPA AirData
Used for Air Quality, Long-Term Fine-Particle Pollution
Checked 2026-05-18
- Federal Emergency Management Agency National Risk Index
Used for Drought Risk
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Partner with Retirement ListsResearch and writing byGrant Gibson
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