Dedham, United Kingdom experiences average highs of 14°C (57°F) and lows of 9°C (48°F) throughout the year. Rainfall is moderate, averaging about 11 rainy days per month. Average highs have warmed by 0.7°C (1.3°F) across the available records.
Dedham, United Kingdom Weather & Climate 2026
Monthly climate averages for Dedham, United Kingdom. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Nov 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.3/10
Best: May, June, July, August, September
UV Index
4
Low
Temperature 14°C / 9°C
Feels Like 12°C / 6°C
Rainy Days 11
Rainfall 59 mm
Sunshine 8 h
Humidity 80%
Wind Speed 24 km/h
Dew Point 8°C
Snow Days 2 days
Frost Days 3 days
Hottest Month
22°C
August
Avg Low15°C
Rain9days
Coldest Month
3°C
January
Avg High7°C
Rain12days
Driest Month
9days
April
Avg High12°C
Avg Low6°C
Windiest Month
28 km/h
February (Gusts 46)
Sea Temperature
5°C – 21°C
Warmest water: August (
20.6°C
)
Worst Time to Visit
Consider avoiding January, February, November, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 04:37
Daylight 16.7h
Sunset 21:19
Live conditions—
Dedham on the map · live conditions
Dedham, United Kingdom
- Continent
- Europe
- Country
- United Kingdom
- City
- Dedham
- Population
- 1K
- Coordinates
- 51.96°, 0.99°
Seasonal Breakdown
Spring
Mar–May
Avg High 13°C
Avg Low 7°C
Rain 10 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 21°C
Avg Low 14°C
Rain 10 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 15°C
Avg Low 10°C
Rain 11 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 8°C
Avg Low 4°C
Rain 12 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: 7°C / 3°C . Feb: 9°C / 4°C . Mar: 10°C / 5°C . Apr: 12°C / 6°C . May: 16°C / 9°C . Jun: 20°C / 13°C . Jul: 22°C / 15°C . Aug: 22°C / 15°C . Sep: 19°C / 13°C . Oct: 15°C / 10°C . Nov: 11°C / 6°C . Dec: 9°C / 5°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 59 mm. Feb: 56 mm. Mar: 53 mm. Apr: 39 mm. May: 50 mm. Jun: 58 mm. Jul: 59 mm. Aug: 59 mm. Sep: 58 mm. Oct: 73 mm. Nov: 65 mm. Dec: 73 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 86%. Feb: 82%. Mar: 80%. Apr: 76%. May: 77%. Jun: 75%. Jul: 73%. Aug: 74%. Sep: 78%. Oct: 82%. Nov: 86%. Dec: 88%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 27 km/h . Feb: 28 km/h . Mar: 26 km/h . Apr: 23 km/h . May: 21 km/h . Jun: 21 km/h . Jul: 21 km/h . Aug: 22 km/h . Sep: 23 km/h . Oct: 25 km/h . Nov: 26 km/h . Dec: 27 km/h .
Sunshine
Sunshine
Sunshine: Jan: 4h. Feb: 5h. Mar: 7h. Apr: 10h. May: 12h. Jun: 12h. Jul: 11h. Aug: 11h. Sep: 9h. Oct: 6h. Nov: 4h. Dec: 3h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 5°C . Feb: 6°C . Mar: 8°C . Apr: 11°C . May: 15°C . Jun: 19°C . Jul: 20°C . Aug: 21°C . Sep: 19°C . Oct: 15°C . Nov: 10°C . Dec: 7°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 2. Mar: UV 3. Apr: UV 5. May: UV 5. Jun: UV 6. Jul: UV 6. Aug: UV 5. Sep: UV 4. Oct: UV 2. Nov: UV 1. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 2 days. Feb: 2 days. Mar: 1 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: 1 days.
Climate Trends
Average highs have warmed 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 · 22°C | Aug · 22°C |
| Coldest month | Jan 2025 · 2°C | Jan · 3°C |
| Wettest month | Nov 2025 · 94 mm | Oct · 73 mm |
| Windiest month | Dec 2025 · 28 km/h | Feb · 28 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May best
Good June best
Good July best
Excellent August best
Excellent September best
Good October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 7°C / 3°C | 3°C / -2°C | 12days (59 mm) Wet | 3.8h Poor | 86% Very Muggy | 1 Low | Poor | View Details |
| February | 9°C / 4°C | 4°C / -1°C | 11days (56 mm) Wet | 5.1h Fair | 82% Humid | 1.7 Low | Poor | View Details |
| March | 10°C / 5°C | 6°C / 0°C | 12days (53 mm) Wet | 7.3h Good | 80% Humid | 3.4 Moderate | Poor | View Details |
| April | 12°C / 6°C | 9°C / 2°C | 9days (39 mm) Wet | 10.3h Excellent | 76% Humid | 4.8 Moderate | Fair | View Details |
| May best | 16°C / 9°C | 14°C / 7°C | 10days (50 mm) Wet | 11.5h Excellent | 77% Humid | 5.4 High | Good | View Details |
| June best | 20°C / 13°C | 19°C / 11°C | 9days (58 mm) Wet | 12h Excellent | 75% Muggy | 6.3 High | Good | View Details |
| July best | 22°C / 15°C | 21°C / 14°C | 12days (59 mm) Wet | 11.4h Excellent | 73% Muggy | 5.7 High | Excellent | View Details |
| August best | 22°C / 15°C | 21°C / 14°C | 9days (59 mm) Wet | 10.7h Excellent | 74% Muggy | 5.4 High | Excellent | View Details |
| September best | 19°C / 13°C | 17°C / 11°C | 11days (58 mm) Wet | 8.6h Good | 78% Humid | 4.1 Moderate | Good | View Details |
| October | 15°C / 10°C | 13°C / 7°C | 12days (73 mm) Wet | 6.2h Fair | 82% Humid | 2.4 Moderate | Fair | View Details |
| November | 11°C / 6°C | 7°C / 3°C | 10days (65 mm) Wet | 4.4h Fair | 86% Very Muggy | 1.3 Low | Poor | View Details |
| December | 9°C / 5°C | 5°C / 1°C | 12days (73 mm) Wet | 2.9h Poor | 88% Very Muggy | 0.8 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Dedham 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 Dedham, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Dedham is August, with average daytime highs of 22°C (71°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Dedham is January, with average overnight lows of 3°C (37°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Dedham is October, averaging 73mm of precipitation across 12 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Dedham runs through January, March, July, October, with the heaviest rainfall in January. Based on 10-year averages for Dedham.
Dedham receives approximately 94 sunshine hours per year. The sunniest month is June with around 12 hours. Based on climate data for Dedham.
The least favorable months to visit Dedham are January, February, November, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Dedham is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Dedham is 80%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 13°C (55°F), which most swimmers will find too cold without a wetsuit.
Yes, Dedham receives snow. Months with snowfall average 2 snow days and 2 cm (1 in) of accumulation, with about 3 frost days during winter.
Average wind speeds in Dedham are 24 km/h (15 mph). The windiest month is February with peak winds reaching 28 km/h (17 mph) (gusts up to 46 km/h / 29 mph).
Dedham averages 2 clear-sky days per month with overall cloud cover around 66%. The clearest skies occur in June.
The annual average dew point in Dedham is 8°C (46°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Dedham has a Oceanic climate, classified as Cfb 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 Dedham ranges from 6°C (43°F) to 12°C (54°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 Dedham. It earns a climate score of 7.3/10 with Good.
For June in Dedham, pack Umbrella, Comfortable walking shoes. With average highs of 20°C (67°F) and 9 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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