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Janesville, United States Snapshot 2026
Where is Janesville?
Janesville, United States
- Continent
- Americas
- Country
- United States
- City
- Janesville
- Population
- 64.1K
- Elevation
- 255 m
- Coordinates
- 42.68°, -89.02°
Janesville is a city in United States with a population of approximately 64.1K. Average temperatures range from -9°C (16°F) in January to 28°C (83°F) in July. The best time to visit is June, July, August, September. The city sits at an elevation of 255 m above sea level.
Time in Janesville right now
Open full time & time zone page 03:07 07
Tuesday, June 16, 2026
IANA time zone
America/Chicago
Daylight saving
DST in effect
CST / CDT
Next DST change
November 1
backward -1h
Live weather in Janesville
Daylight in Janesville today
View full sunrise & sunset page Sunrise
Sunset
Day length
15h 19m
Climate normals for Janesville
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Fair May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -1°C / -9°C | -6°C / -14°C | 8days (51 mm) Wet | 5.2h Fair | 75% Muggy | 2.2 Moderate | Poor | View Details |
| February | 2°C / -8°C | -3°C / -13°C | 7days (40 mm) Good | 6.9h Fair | 71% Muggy | 3.4 Moderate | Poor | View Details |
| March | 9°C / -1°C | 5°C / -6°C | 9days (81 mm) Wet | 7.7h Good | 67% Muggy | 4.4 Moderate | Poor | View Details |
| April | 14°C / 4°C | 11°C / 0°C | 13days (99 mm) Wet | 8.7h Good | 66% Muggy | 5.3 High | Fair | View Details |
| May | 21°C / 10°C | 20°C / 8°C | 13days (109 mm) Wet | 10h Excellent | 68% Muggy | 6.4 High | Good | View Details |
| June best | 27°C / 17°C | 28°C / 17°C | 11days (96 mm) Wet | 11.6h Excellent | 67% Muggy | 7 High | Excellent | View Details |
| July best | 28°C / 19°C | 30°C / 20°C | 10days (86 mm) Wet | 12.1h Excellent | 71% Muggy | 7 High | Excellent | View Details |
| August best | 27°C / 18°C | 29°C / 19°C | 10days (93 mm) Wet | 11.1h Excellent | 71% Muggy | 6.3 High | Excellent | View Details |
| September best | 24°C / 15°C | 24°C / 15°C | 9days (95 mm) Wet | 9.4h Good | 71% Muggy | 5.2 High | Excellent | View Details |
| October | 16°C / 8°C | 14°C / 6°C | 10days (83 mm) Wet | 7.1h Good | 69% Muggy | 3.7 Moderate | Fair | View Details |
| November | 8°C / 1°C | 4°C / -3°C | 7days (49 mm) Good | 6.1h Fair | 70% Muggy | 2.4 Moderate | Poor | View Details |
| December | 2°C / -5°C | -2°C / -10°C | 8days (50 mm) Wet | 5.1h Fair | 73% Muggy | 1.9 Low | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: -1°C / -9°C . Feb: 2°C / -8°C . Mar: 9°C / -1°C . Apr: 14°C / 4°C . May: 21°C / 10°C . Jun: 27°C / 17°C . Jul: 28°C / 19°C . Aug: 27°C / 18°C . Sep: 24°C / 15°C . Oct: 16°C / 8°C . Nov: 8°C / 1°C . Dec: 2°C / -5°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 51 mm. Feb: 40 mm. Mar: 81 mm. Apr: 99 mm. May: 109 mm. Jun: 96 mm. Jul: 86 mm. Aug: 93 mm. Sep: 95 mm. Oct: 83 mm. Nov: 49 mm. Dec: 50 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 75%. Feb: 71%. Mar: 67%. Apr: 66%. May: 68%. Jun: 67%. Jul: 71%. Aug: 71%. Sep: 71%. Oct: 69%. Nov: 70%. Dec: 73%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 19 km/h . Feb: 20 km/h . Mar: 21 km/h . Apr: 21 km/h . May: 18 km/h . Jun: 18 km/h . Jul: 15 km/h . Aug: 15 km/h . Sep: 16 km/h . Oct: 19 km/h . Nov: 20 km/h . Dec: 19 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 4. Nov: UV 2. Dec: UV 2.
Frequently Asked Questions
Janesville has a population of approximately 64.1K.
The best months to visit Janesville are June, July, August, September, when temperatures are pleasant and rainfall is lower.
Janesville receives approximately 932mm of rainfall annually across 115 rainy days.
Janesville is located in United States, in the Americas region.
Janesville sits at an elevation of 255 m (837 ft) above sea level.