Overlea, United States experiences average highs of 18°C (64°F) and lows of 10°C (50°F) throughout the year. Rainfall is moderate, averaging about 11 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have cooled by 0.7°C (1.3°F) across the available records.
Overlea, United States Weather & Climate 2026
Monthly climate averages for Overlea, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Sep At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.6/10
Best: April, May, June, August, September
UV Index
5
Low
Temperature 18°C / 10°C
Feels Like 17°C / 8°C
Rainy Days 11
Rainfall 107 mm
Sunshine 9 h
Humidity 71%
Wind Speed 19 km/h
Dew Point 9°C
Snow Days 3 days
Frost Days 10 days
Hottest Month
30°C
July
Avg Low22°C
Rain15days
Coldest Month
-1°C
January
Avg High5°C
Rain10days
Driest Month
8days
November
Avg High13°C
Avg Low5°C
Windiest Month
22 km/h
March (Gusts 40)
Sea Temperature
3°C – 29°C
Warmest water: July (
29.1°C
)
Worst Time to Visit
Consider avoiding January, February, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 05:40
Daylight 14.9h
Sunset 20:36
Live conditions—
Overlea on the map · live conditions
Overlea, United States
- Continent
- Americas
- Country
- United States
- City
- Overlea
- Population
- 12.3K
- Elevation
- 69 m
- Coordinates
- 39.36°, -76.52°
Seasonal Breakdown
Spring
Mar–May
Avg High 17°C
Avg Low 9°C
Rain 11 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 28°C
Avg Low 21°C
Rain 13 days/mo
2/3 best months
Autumn
Sep–Nov
Avg High 19°C
Avg Low 12°C
Rain 9 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 7°C
Avg Low 0°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: 5°C / -1°C . Feb: 8°C / 0°C . Mar: 12°C / 3°C . Apr: 17°C / 9°C . May: 22°C / 14°C . Jun: 27°C / 19°C . Jul: 30°C / 22°C . Aug: 28°C / 21°C . Sep: 25°C / 18°C . Oct: 19°C / 12°C . Nov: 13°C / 5°C . Dec: 7°C / 1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 90 mm. Feb: 103 mm. Mar: 97 mm. Apr: 100 mm. May: 129 mm. Jun: 101 mm. Jul: 151 mm. Aug: 112 mm. Sep: 114 mm. Oct: 97 mm. Nov: 79 mm. Dec: 116 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 68%. Feb: 69%. Mar: 65%. Apr: 67%. May: 74%. Jun: 72%. Jul: 75%. Aug: 76%. Sep: 76%. Oct: 74%. Nov: 69%. Dec: 71%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 22 km/h . Feb: 21 km/h . Mar: 22 km/h . Apr: 22 km/h . May: 18 km/h . Jun: 18 km/h . Jul: 16 km/h . Aug: 15 km/h . Sep: 17 km/h . Oct: 19 km/h . Nov: 21 km/h . Dec: 20 km/h .
Sunshine
Sunshine
Sunshine: Jan: 6h. Feb: 7h. Mar: 8h. Apr: 9h. May: 9h. Jun: 11h. Jul: 12h. Aug: 11h. Sep: 9h. Oct: 8h. Nov: 7h. Dec: 6h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 3°C . Feb: 5°C . Mar: 8°C . Apr: 14°C . May: 20°C . Jun: 24°C . Jul: 29°C . Aug: 28°C . Sep: 24°C . Oct: 19°C . Nov: 12°C . Dec: 6°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 6. Jun: UV 7. Jul: UV 8. Aug: UV 7. 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: 5 days. Feb: 4 days. Mar: 2 days. Apr: 0 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 0 days. Dec: 2 days.
Climate Trends
Average highs have cooled by 0.7°C (1.3°F) 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 · 30°C |
| Coldest month | Jan 2025 · -4°C | Jan · -1°C |
| Wettest month | Jul 2025 · 244 mm | Jul · 151 mm |
| Windiest month | Mar 2025 · 24 km/h | Mar · 22 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April best
Good May best
Excellent June best
Excellent July
Fair August best
Excellent September best
Excellent October
Good November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 5°C / -1°C | 1°C / -6°C | 10days (90 mm) Wet | 6.2h Fair | 68% Muggy | 2.5 Moderate | Poor | View Details |
| February | 8°C / 0°C | 4°C / -4°C | 10days (103 mm) Wet | 6.8h Fair | 69% Muggy | 3.5 Moderate | Poor | View Details |
| March | 12°C / 3°C | 9°C / -1°C | 10days (97 mm) Wet | 8.2h Good | 65% Muggy | 4.8 Moderate | Poor | View Details |
| April best | 17°C / 9°C | 16°C / 5°C | 10days (100 mm) Wet | 9.2h Good | 67% Muggy | 5.7 High | Good | View Details |
| May best | 22°C / 14°C | 22°C / 12°C | 14days (129 mm) Wet | 9.3h Good | 74% Muggy | 6.3 High | Excellent | View Details |
| June best | 27°C / 19°C | 29°C / 19°C | 12days (101 mm) Wet | 11.4h Excellent | 72% Muggy | 7.2 Very High | Excellent | View Details |
| July | 30°C / 22°C | 34°C / 25°C | 15days (151 mm) Wet | 11.8h Excellent | 75% Muggy | 7.5 Very High | Fair | View Details |
| August best | 28°C / 21°C | 31°C / 23°C | 13days (112 mm) Wet | 10.6h Excellent | 76% Humid | 6.8 High | Excellent | View Details |
| September best | 25°C / 18°C | 26°C / 18°C | 11days (114 mm) Wet | 8.6h Good | 76% Humid | 5.2 High | Excellent | View Details |
| October | 19°C / 12°C | 18°C / 10°C | 9days (97 mm) Wet | 7.8h Good | 74% Muggy | 4.4 Moderate | Good | View Details |
| November | 13°C / 5°C | 10°C / 2°C | 8days (79 mm) Wet | 7.2h Good | 69% Muggy | 3.1 Moderate | Fair | View Details |
| December | 7°C / 1°C | 4°C / -4°C | 10days (116 mm) Wet | 5.9h Fair | 71% Muggy | 2.2 Moderate | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Overlea are April, May, June, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Overlea, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Overlea is July, with average daytime highs of 30°C (85°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Overlea is January, with average overnight lows of -1°C (29°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Overlea is July, averaging 151mm of precipitation across 15 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Overlea runs through July, May, August, June, with the heaviest rainfall in July. Based on 10-year averages for Overlea.
Overlea receives approximately 103 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Overlea.
The least favorable months to visit Overlea are January, February, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider April, May, June, August, September instead.
The annual average UV index in Overlea is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Overlea is 71%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in June, July, August, September average 26°C (79°F), which is warm and comfortable for swimming and water activities.
Yes, Overlea receives snow. Months with snowfall average 3 snow days and 8 cm (3 in) of accumulation, with about 10 frost days during winter.
Average wind speeds in Overlea are 19 km/h (12 mph). The windiest month is March with peak winds reaching 22 km/h (14 mph) (gusts up to 40 km/h / 25 mph).
Overlea averages 5 clear-sky days per month with overall cloud cover around 57%. The clearest skies occur in November.
The annual average dew point in Overlea is 9°C (48°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Overlea 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 Overlea ranges from 8°C (46°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 Overlea. It earns a climate score of 8.7/10 with Excellent.
For June in Overlea, 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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