Deerfield, United States experiences average highs of 13°C (55°F) and lows of 8°C (46°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have stayed broadly stable across the available records.
Deerfield, United States Weather & Climate 2026
Monthly climate averages for Deerfield, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Mar–Jun At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.2/10
Best: June, July, August, September, October
UV Index
5
Low
Temperature 13°C / 8°C
Feels Like 11°C / 5°C
Rainy Days 10
Rainfall 82 mm
Sunshine 9 h
Humidity 75%
Wind Speed 21 km/h
Dew Point 6°C
Snow Days 6 days
Frost Days 15 days
Hottest Month
25°C
July
Avg Low20°C
Rain10days
Coldest Month
-5°C
January
Avg High0°C
Rain9days
Driest Month
8days
February
Avg High2°C
Avg Low-4°C
Windiest Month
24 km/h
February (Gusts 44)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures.
Sun Position
Sunrise 05:16
Daylight 15.2h
Sunset 20:30
Live conditions—
Deerfield on the map · live conditions
Deerfield, United States
- Continent
- Americas
- Country
- United States
- City
- Deerfield
- Population
- 19K
- Elevation
- 209 m
- Coordinates
- 42.17°, -87.84°
Seasonal Breakdown
Spring
Mar–May
Avg High 11°C
Avg Low 5°C
Rain 12 days/mo
Summer
Jun–Aug
Avg High 24°C
Avg Low 19°C
Rain 11 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 16°C
Avg Low 11°C
Rain 9 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 1°C
Avg Low -4°C
Rain 9 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: 0°C / -5°C . Feb: 2°C / -4°C . Mar: 6°C / 0°C . Apr: 10°C / 4°C . May: 16°C / 10°C . Jun: 22°C / 16°C . Jul: 25°C / 20°C . Aug: 25°C / 20°C . Sep: 22°C / 17°C . Oct: 16°C / 11°C . Nov: 8°C / 4°C . Dec: 3°C / -2°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 65 mm. Feb: 53 mm. Mar: 88 mm. Apr: 113 mm. May: 121 mm. Jun: 90 mm. Jul: 89 mm. Aug: 79 mm. Sep: 74 mm. Oct: 102 mm. Nov: 56 mm. Dec: 59 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 73%. Mar: 74%. Apr: 74%. May: 78%. Jun: 77%. Jul: 79%. Aug: 77%. Sep: 75%. Oct: 72%. Nov: 71%. Dec: 74%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 23 km/h . Feb: 24 km/h . Mar: 23 km/h . Apr: 23 km/h . May: 20 km/h . Jun: 19 km/h . Jul: 17 km/h . Aug: 16 km/h . Sep: 19 km/h . Oct: 22 km/h . Nov: 23 km/h . Dec: 23 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 7h. Mar: 8h. Apr: 9h. May: 10h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 10h. Oct: 7h. Nov: 6h. Dec: 5h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 5. Apr: UV 5. May: UV 7. Jun: UV 7. Jul: UV 7. 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: 11 days. Feb: 10 days. Mar: 5 days. Apr: 3 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 · 26°C | Jul · 25°C |
| Coldest month | Jan 2025 · -7°C | Jan · -5°C |
| Wettest month | Jul 2025 · 113 mm | May · 121 mm |
| Windiest month | Mar 2025 · 26 km/h | Feb · 24 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October best
Good November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 0°C / -5°C | -5°C / -11°C | 9days (65 mm) Wet | 5.1h Fair | 76% Humid | 2.1 Moderate | Poor | View Details |
| February | 2°C / -4°C | -3°C / -10°C | 8days (53 mm) Wet | 6.9h Fair | 73% Muggy | 3.3 Moderate | Poor | View Details |
| March | 6°C / 0°C | 2°C / -5°C | 11days (88 mm) Wet | 7.8h Good | 74% Muggy | 4.5 Moderate | Poor | View Details |
| April | 10°C / 4°C | 7°C / 0°C | 13days (113 mm) Wet | 8.9h Good | 74% Muggy | 5.3 High | Poor | View Details |
| May | 16°C / 10°C | 15°C / 7°C | 13days (121 mm) Wet | 10.2h Excellent | 78% Humid | 6.6 High | Good | View Details |
| June best | 22°C / 16°C | 24°C / 16°C | 12days (90 mm) Wet | 11.9h Excellent | 77% Humid | 7.1 Very High | Excellent | View Details |
| July best | 25°C / 20°C | 28°C / 21°C | 10days (89 mm) Wet | 12.1h Excellent | 79% Humid | 7 High | Excellent | View Details |
| August best | 25°C / 20°C | 28°C / 21°C | 10days (79 mm) Wet | 11.4h Excellent | 77% Humid | 6.5 High | Excellent | View Details |
| September best | 22°C / 17°C | 23°C / 17°C | 10days (74 mm) Wet | 9.6h Good | 75% Muggy | 5.2 High | Excellent | View Details |
| October best | 16°C / 11°C | 14°C / 8°C | 10days (102 mm) Wet | 7.3h Good | 72% Muggy | 3.7 Moderate | Good | View Details |
| November | 8°C / 4°C | 5°C / -1°C | 8days (56 mm) Wet | 6.1h Fair | 71% Muggy | 2.5 Moderate | Poor | View Details |
| December | 3°C / -2°C | -1°C / -7°C | 9days (59 mm) Wet | 5.1h Fair | 74% Muggy | 1.8 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Deerfield are June, July, August, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Deerfield, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Deerfield is July, with average daytime highs of 25°C (78°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Deerfield is January, with average overnight lows of -5°C (23°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Deerfield is May, averaging 121mm of precipitation across 13 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Deerfield runs through April, May, June, March, with the heaviest rainfall in April. Based on 10-year averages for Deerfield.
Deerfield receives approximately 102 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Deerfield.
The least favorable months to visit Deerfield are January, February, March, December, primarily due to very cold temperatures. For the best conditions, consider June, July, August, September, October instead.
The annual average UV index in Deerfield is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Deerfield is 75%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Deerfield receives snow. Months with snowfall average 6 snow days and 11 cm (4 in) of accumulation, with about 15 frost days during winter.
Average wind speeds in Deerfield are 21 km/h (13 mph). The windiest month is February with peak winds reaching 24 km/h (15 mph) (gusts up to 44 km/h / 27 mph).
Deerfield averages 4 clear-sky days per month with overall cloud cover around 61%. The clearest skies occur in September.
The annual average dew point in Deerfield is 6°C (43°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Deerfield 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 Deerfield ranges from 5°C (41°F) to 11°C (52°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 Deerfield. It earns a climate score of 8.6/10 with Excellent.
For June in Deerfield, pack Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 22°C (72°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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