Suffolk, United States experiences average highs of 21°C (70°F) and lows of 13°C (55°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 stayed broadly stable across the available records.
Suffolk, United States Weather & Climate 2026
Monthly climate averages for Suffolk, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Feb–Aug At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.3/10
Best: April, May, September, October
UV Index
5
Low
Temperature 21°C / 13°C
Feels Like 22°C / 12°C
Rainy Days 11
Rainfall 104 mm
Sunshine 9 h
Humidity 73%
Wind Speed 17 km/h
Dew Point 12°C
Snow Days 1 days
Frost Days 6 days
Hottest Month
31°C
July
Avg Low23°C
Rain16days
Coldest Month
2°C
January
Avg High10°C
Rain10days
Driest Month
7days
October
Avg High22°C
Avg Low14°C
Windiest Month
21 km/h
March (Gusts 45)
Worst Time to Visit
Consider avoiding January, February, July due to frequent rain.
Sun Position
Sunrise 05:48
Daylight 14.7h
Sunset 20:28
Live conditions—
Suffolk on the map · live conditions
Suffolk, United States
- Continent
- Americas
- Country
- United States
- City
- Suffolk
- Population
- 88.2K
- Elevation
- 15 m
- Coordinates
- 36.73°, -76.58°
Seasonal Breakdown
Spring
Mar–May
Avg High 21°C
Avg Low 11°C
Rain 11 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 30°C
Avg Low 22°C
Rain 14 days/mo
Autumn
Sep–Nov
Avg High 22°C
Avg Low 14°C
Rain 8 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 12°C
Avg Low 3°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: 10°C / 2°C . Feb: 14°C / 4°C . Mar: 17°C / 7°C . Apr: 22°C / 11°C . May: 25°C / 16°C . Jun: 29°C / 20°C . Jul: 31°C / 23°C . Aug: 30°C / 22°C . Sep: 27°C / 20°C . Oct: 22°C / 14°C . Nov: 17°C / 8°C . Dec: 12°C / 4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 98 mm. Feb: 96 mm. Mar: 89 mm. Apr: 95 mm. May: 116 mm. Jun: 100 mm. Jul: 145 mm. Aug: 132 mm. Sep: 134 mm. Oct: 86 mm. Nov: 66 mm. Dec: 90 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 69%. Feb: 71%. Mar: 66%. Apr: 66%. May: 73%. Jun: 73%. Jul: 78%. Aug: 79%. Sep: 78%. Oct: 74%. Nov: 71%. Dec: 73%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 19 km/h . Feb: 20 km/h . Mar: 21 km/h . Apr: 20 km/h . May: 18 km/h . Jun: 15 km/h . Jul: 15 km/h . Aug: 14 km/h . Sep: 16 km/h . Oct: 16 km/h . Nov: 17 km/h . Dec: 18 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 7h. Mar: 8h. Apr: 10h. May: 10h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 9h. Oct: 8h. Nov: 7h. Dec: 6h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 7. Jun: UV 8. Jul: UV 8. Aug: UV 7. Sep: UV 6. Oct: UV 5. Nov: UV 4. Dec: UV 3.
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: 1 days. Mar: 0 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 stayed broadly stable across the available records. Average rainfall is trending drier by about 33 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 32°C | Jul · 31°C |
| Coldest month | Jan 2025 · -1°C | Jan · 2°C |
| Wettest month | May 2025 · 135 mm | Jul · 145 mm |
| Windiest month | Mar 2025 · 21 km/h | Mar · 21 km/h |
Month-by-Month Weather Table
January
Poor 
February
Fair March
Fair April best
Good May best
Excellent June
Good July
Poor August
Fair September best
Excellent October best
Excellent November
Fair December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 10°C / 2°C | 7°C / -2°C | 10days (98 mm) Wet | 6.5h Fair | 69% Muggy | 3.1 Moderate | Poor | View Details |
| February | 14°C / 4°C | 11°C / 1°C | 11days (96 mm) Wet | 6.7h Fair | 71% Muggy | 3.8 Moderate | Fair | View Details |
| March | 17°C / 7°C | 15°C / 4°C | 10days (89 mm) Wet | 8.4h Good | 66% Muggy | 5.3 High | Fair | View Details |
| April best | 22°C / 11°C | 21°C / 9°C | 10days (95 mm) Wet | 10h Excellent | 66% Muggy | 6.4 High | Good | View Details |
| May best | 25°C / 16°C | 26°C / 16°C | 12days (116 mm) Wet | 9.8h Good | 73% Muggy | 6.8 High | Excellent | View Details |
| June | 29°C / 20°C | 32°C / 22°C | 12days (100 mm) Wet | 11.7h Excellent | 73% Muggy | 7.7 Very High | Good | View Details |
| July | 31°C / 23°C | 36°C / 27°C | 16days (145 mm) Wet | 11.6h Excellent | 78% Humid | 7.8 Very High | Poor | View Details |
| August | 30°C / 22°C | 34°C / 25°C | 15days (132 mm) Wet | 10.7h Excellent | 79% Humid | 6.9 High | Fair | View Details |
| September best | 27°C / 20°C | 29°C / 21°C | 10days (134 mm) Wet | 9h Good | 78% Humid | 5.6 High | Excellent | View Details |
| October best | 22°C / 14°C | 22°C / 13°C | 7days (86 mm) Good | 8h Good | 74% Muggy | 4.7 Moderate | Excellent | View Details |
| November | 17°C / 8°C | 15°C / 5°C | 8days (66 mm) Wet | 7.4h Good | 71% Muggy | 3.5 Moderate | Fair | View Details |
| December | 12°C / 4°C | 10°C / 0°C | 9days (90 mm) Wet | 6.3h Fair | 73% Muggy | 2.7 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Suffolk are April, May, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Suffolk, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Suffolk is July, with average daytime highs of 31°C (89°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Suffolk is January, with average overnight lows of 2°C (35°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Suffolk is July, averaging 145mm of precipitation across 16 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Suffolk runs through July, August, May, June, with the heaviest rainfall in July. Based on 10-year averages for Suffolk.
Suffolk receives approximately 106 sunshine hours per year. The sunniest month is June with around 12 hours. Based on climate data for Suffolk.
The least favorable months to visit Suffolk are January, February, July, primarily due to frequent rain. For the best conditions, consider April, May, September, October instead.
The annual average UV index in Suffolk is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Suffolk is 73%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Suffolk receives snow. Months with snowfall average 1 snow days and 4 cm (2 in) of accumulation, with about 6 frost days during winter.
Average wind speeds in Suffolk are 17 km/h (11 mph). The windiest month is March with peak winds reaching 21 km/h (13 mph) (gusts up to 45 km/h / 28 mph).
Suffolk averages 5 clear-sky days per month with overall cloud cover around 56%. The clearest skies occur in November.
The annual average dew point in Suffolk is 12°C (54°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Suffolk 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 Suffolk ranges from 12°C (54°F) to 22°C (72°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 Suffolk. It earns a climate score of 7.3/10 with Good.
For June in Suffolk, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 29°C (85°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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