Waterville, United States experiences average highs of 13°C (55°F) and lows of 4°C (39°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Average highs have stayed broadly stable across the available records.
Waterville, United States Weather & Climate 2026
Monthly climate averages for Waterville, 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
5/10
Best: May, June, July, August, September
UV Index
4
Low
Temperature 13°C / 4°C
Feels Like 11°C / 2°C
Rainy Days 10
Rainfall 89 mm
Sunshine 8 h
Humidity 74%
Wind Speed 16 km/h
Dew Point 4°C
Snow Days 8 days
Frost Days 19 days
Hottest Month
27°C
July
Avg Low18°C
Rain10days
Coldest Month
-10°C
January
Avg High-1°C
Rain9days
Driest Month
7days
September
Avg High22°C
Avg Low14°C
Windiest Month
19 km/h
March (Gusts 42)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures.
Sun Position
Sunrise 04:54
Daylight 15.5h
Sunset 20:26
Live conditions—
Waterville on the map · live conditions
Waterville, United States
- Continent
- Americas
- Country
- United States
- City
- Waterville
- Population
- 16.3K
- Elevation
- 33 m
- Coordinates
- 44.55°, -69.63°
Seasonal Breakdown
Spring
Mar–May
Avg High 12°C
Avg Low 2°C
Rain 11 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 25°C
Avg Low 16°C
Rain 11 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 15°C
Avg Low 7°C
Rain 9 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 0°C
Avg Low -9°C
Rain 10 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 / -10°C . Feb: 1°C / -9°C . Mar: 5°C / -4°C . Apr: 11°C / 2°C . May: 18°C / 8°C . Jun: 23°C / 14°C . Jul: 27°C / 18°C . Aug: 26°C / 17°C . Sep: 22°C / 14°C . Oct: 15°C / 8°C . Nov: 7°C / 1°C . Dec: 1°C / -7°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 90 mm. Feb: 74 mm. Mar: 90 mm. Apr: 103 mm. May: 76 mm. Jun: 84 mm. Jul: 85 mm. Aug: 76 mm. Sep: 71 mm. Oct: 114 mm. Nov: 84 mm. Dec: 117 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 73%. Feb: 72%. Mar: 69%. Apr: 70%. May: 72%. Jun: 74%. Jul: 75%. Aug: 75%. Sep: 76%. Oct: 78%. Nov: 75%. Dec: 74%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 17 km/h . Feb: 18 km/h . Mar: 19 km/h . Apr: 18 km/h . May: 16 km/h . Jun: 16 km/h . Jul: 15 km/h . Aug: 14 km/h . Sep: 15 km/h . Oct: 16 km/h . Nov: 17 km/h . Dec: 17 km/h .
Sunshine
Sunshine
Sunshine: Jan: 6h. Feb: 7h. Mar: 8h. Apr: 8h. May: 9h. Jun: 11h. Jul: 11h. 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 5. Jun: UV 6. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. 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: 12 days. Feb: 11 days. Mar: 8 days. Apr: 4 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 4 days. Dec: 9 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 · 28°C | Jul · 27°C |
| Coldest month | Feb 2025 · -12°C | Jan · -10°C |
| Wettest month | Apr 2025 · 119 mm | Dec · 117 mm |
| Windiest month | Feb 2025 · 19 km/h | Mar · 19 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
Excellent October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -1°C / -10°C | -5°C / -15°C | 9days (90 mm) Wet | 5.9h Fair | 73% Muggy | 2.1 Moderate | Poor | View Details |
| February | 1°C / -9°C | -4°C / -14°C | 10days (74 mm) Wet | 6.8h Fair | 72% Muggy | 3.1 Moderate | Poor | View Details |
| March | 5°C / -4°C | 1°C / -9°C | 10days (90 mm) Wet | 7.9h Good | 69% Muggy | 3.6 Moderate | Poor | View Details |
| April | 11°C / 2°C | 8°C / -2°C | 12days (103 mm) Wet | 8.2h Good | 70% Muggy | 4.9 Moderate | Poor | View Details |
| May best | 18°C / 8°C | 17°C / 6°C | 10days (76 mm) Wet | 9.4h Good | 72% Muggy | 5.4 High | Good | View Details |
| June best | 23°C / 14°C | 24°C / 13°C | 12days (84 mm) Wet | 10.7h Excellent | 74% Muggy | 6 High | Excellent | View Details |
| July best | 27°C / 18°C | 29°C / 19°C | 10days (85 mm) Wet | 11h Excellent | 75% Muggy | 6.7 High | Excellent | View Details |
| August best | 26°C / 17°C | 27°C / 18°C | 10days (76 mm) Wet | 10.5h Excellent | 75% Muggy | 6.1 High | Excellent | View Details |
| September best | 22°C / 14°C | 22°C / 13°C | 7days (71 mm) Good | 9h Good | 76% Humid | 5.1 High | Excellent | View Details |
| October | 15°C / 8°C | 13°C / 6°C | 9days (114 mm) Wet | 6.7h Fair | 78% Humid | 3.4 Moderate | Fair | View Details |
| November | 7°C / 1°C | 4°C / -4°C | 10days (84 mm) Wet | 6.1h Fair | 75% Muggy | 2.2 Moderate | Poor | View Details |
| December | 1°C / -7°C | -3°C / -11°C | 10days (117 mm) Wet | 5.3h Fair | 74% Muggy | 1.7 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Waterville 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 Waterville, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Waterville is July, with average daytime highs of 27°C (80°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Waterville is January, with average overnight lows of -10°C (14°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Waterville is December, averaging 117mm of precipitation across 10 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Waterville runs through April, June, February, March, with the heaviest rainfall in April. Based on 10-year averages for Waterville.
Waterville receives approximately 98 sunshine hours per year. The sunniest month is July with around 11 hours. Based on climate data for Waterville.
The least favorable months to visit Waterville 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 Waterville is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Waterville is 74%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Waterville receives snow. Months with snowfall average 8 snow days and 24 cm (9 in) of accumulation, with about 19 frost days during winter.
Average wind speeds in Waterville are 16 km/h (10 mph). The windiest month is March with peak winds reaching 19 km/h (12 mph) (gusts up to 42 km/h / 26 mph).
Waterville averages 4 clear-sky days per month with overall cloud cover around 59%. The clearest skies occur in September.
The annual average dew point in Waterville is 4°C (39°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Waterville 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 Waterville ranges from 2°C (36°F) to 11°C (52°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 Waterville. It earns a climate score of 8.5/10 with Excellent.
For June in Waterville, pack Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 23°C (74°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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