Harvard, United States experiences average highs of 15°C (59°F) and lows of 6°C (43°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Average highs have stayed broadly stable across the available records.
Harvard, United States Weather & Climate 2026
Monthly climate averages for Harvard, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Apr–Jun At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.2/10
Best: June, July, August, September
UV Index
5
Low
Temperature 15°C / 6°C
Feels Like 13°C / 3°C
Rainy Days 10
Rainfall 80 mm
Sunshine 8 h
Humidity 71%
Wind Speed 19 km/h
Dew Point 5°C
Snow Days 6 days
Frost Days 17 days
Hottest Month
28°C
July
Avg Low19°C
Rain10days
Coldest Month
-9°C
January
Avg High-1°C
Rain8days
Driest Month
7days
November
Avg High8°C
Avg Low1°C
Windiest Month
21 km/h
April (Gusts 46)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures.
Sun Position
Sunrise 05:18
Daylight 15.3h
Sunset 20:34
Live conditions—
Harvard on the map · live conditions
Harvard, United States
- Continent
- Americas
- Country
- United States
- City
- Harvard
- Population
- 9.2K
- Elevation
- 292 m
- Coordinates
- 42.42°, -88.61°
Seasonal Breakdown
Spring
Mar–May
Avg High 14°C
Avg Low 4°C
Rain 12 days/mo
Summer
Jun–Aug
Avg High 27°C
Avg Low 18°C
Rain 11 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 16°C
Avg Low 8°C
Rain 9 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 1°C
Avg Low -7°C
Rain 8 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: -1°C / -9°C . Feb: 2°C / -7°C . Mar: 9°C / -1°C . Apr: 14°C / 4°C . May: 21°C / 10°C . Jun: 27°C / 16°C . Jul: 28°C / 19°C . Aug: 27°C / 18°C . Sep: 24°C / 15°C . Oct: 17°C / 8°C . Nov: 8°C / 1°C . Dec: 2°C / -5°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 56 mm. Feb: 46 mm. Mar: 85 mm. Apr: 105 mm. May: 117 mm. Jun: 93 mm. Jul: 92 mm. Aug: 89 mm. Sep: 91 mm. Oct: 89 mm. Nov: 49 mm. Dec: 52 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 71%. Mar: 68%. Apr: 67%. May: 69%. Jun: 68%. Jul: 72%. Aug: 72%. Sep: 71%. Oct: 70%. Nov: 71%. Dec: 74%.
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: 19 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: 20 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 7h. Mar: 8h. Apr: 9h. May: 10h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 9h. Oct: 7h. Nov: 6h. Dec: 5h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 5. May: UV 7. Jun: UV 7. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 11 days. Feb: 10 days. Mar: 5 days. Apr: 4 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 1 days. Nov: 4 days. Dec: 8 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 29°C | Jul · 28°C |
| Coldest month | Jan 2025 · -9°C | Jan · -9°C |
| Wettest month | Jul 2025 · 121 mm | May · 117 mm |
| Windiest month | Mar 2025 · 23 km/h | Apr · 21 km/h |
Month-by-Month Weather Table
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 (56 mm) Wet | 5.1h Fair | 76% Humid | 2.2 Moderate | Poor | View Details |
| February | 2°C / -7°C | -3°C / -12°C | 8days (46 mm) Wet | 6.9h Fair | 71% Muggy | 3.4 Moderate | Poor | View Details |
| March | 9°C / -1°C | 5°C / -6°C | 10days (85 mm) Wet | 7.6h Good | 68% Muggy | 4.4 Moderate | Poor | View Details |
| April | 14°C / 4°C | 11°C / 0°C | 13days (105 mm) Wet | 8.6h Good | 67% Muggy | 5.2 High | Fair | View Details |
| May | 21°C / 10°C | 20°C / 8°C | 13days (117 mm) Wet | 10h Excellent | 69% Muggy | 6.5 High | Good | View Details |
| June best | 27°C / 16°C | 28°C / 16°C | 12days (93 mm) Wet | 11.7h Excellent | 68% Muggy | 7 High | Excellent | View Details |
| July best | 28°C / 19°C | 30°C / 20°C | 10days (92 mm) Wet | 12h Excellent | 72% Muggy | 7 High | Excellent | View Details |
| August best | 27°C / 18°C | 29°C / 19°C | 10days (89 mm) Wet | 11.1h Excellent | 72% Muggy | 6.3 High | Excellent | View Details |
| September best | 24°C / 15°C | 24°C / 14°C | 9days (91 mm) Wet | 9.4h Good | 71% Muggy | 5.3 High | Excellent | View Details |
| October | 17°C / 8°C | 14°C / 5°C | 10days (89 mm) Wet | 7.2h Good | 70% Muggy | 3.7 Moderate | Fair | View Details |
| November | 8°C / 1°C | 4°C / -3°C | 7days (49 mm) Good | 6.1h Fair | 71% Muggy | 2.5 Moderate | Poor | View Details |
| December | 2°C / -5°C | -2°C / -10°C | 8days (52 mm) Wet | 5.1h Fair | 74% Muggy | 1.9 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Harvard are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Harvard, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Harvard is July, with average daytime highs of 28°C (82°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Harvard is January, with average overnight lows of -9°C (17°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Harvard is May, averaging 117mm of precipitation across 13 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Harvard runs through April, May, June, March, with the heaviest rainfall in April. Based on 10-year averages for Harvard.
Harvard receives approximately 101 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Harvard.
The least favorable months to visit Harvard are January, February, March, December, primarily due to very cold temperatures. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Harvard is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Harvard is 71%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Harvard receives snow. Months with snowfall average 6 snow days and 11 cm (4 in) of accumulation, with about 17 frost days during winter.
Average wind speeds in Harvard are 19 km/h (12 mph). The windiest month is April with peak winds reaching 21 km/h (13 mph) (gusts up to 46 km/h / 28 mph).
Harvard averages 4 clear-sky days per month with overall cloud cover around 60%. The clearest skies occur in September.
The annual average dew point in Harvard is 5°C (41°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Harvard has a Hot-Summer Continental climate, classified as Dfa under the Köppen system. Continental climates experience extreme temperature ranges — hot summers and cold, snowy winters.
The 'feels like' temperature in Harvard ranges from 3°C (37°F) to 13°C (55°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Harvard. It earns a climate score of 8.4/10 with Excellent.
For June in Harvard, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 27°C (80°F) and 12 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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