Trinity, Jersey experiences average highs of 13°C (55°F) and lows of 11°C (52°F) throughout the year. Rainfall is frequent, averaging about 13 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have warmed by 0.8°C (1.4°F) across the available records.
Trinity, Jersey Weather & Climate 2026
Monthly climate averages for Trinity, Jersey. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Apr–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.8/10
Best: June, July, August
UV Index
4
Low
Temperature 13°C / 11°C
Feels Like 10°C / 6°C
Rainy Days 13
Rainfall 88 mm
Sunshine 9 h
Humidity 80%
Wind Speed 34 km/h
Dew Point 9°C
Snow Days 1 days
Frost Days 1 days
Hottest Month
19°C
August
Avg Low16°C
Rain9days
Coldest Month
6°C
January
Avg High9°C
Rain17days
Driest Month
9days
April
Avg High11°C
Avg Low8°C
Windiest Month
40 km/h
December (Gusts 55)
Sea Temperature
9°C – 20°C
Warmest water: August (
19.5°C
)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 05:04
Daylight 16.2h
Sunset 21:17
Live conditions—
Trinity on the map · live conditions
Trinity, Jersey
- Continent
- Europe
- Country
- Jersey
- City
- Trinity
- Population
- 3.2K
- Coordinates
- 49.23°, -2.09°
Seasonal Breakdown
Spring
Mar–May
Avg High 12°C
Avg Low 9°C
Rain 11 days/mo
Summer
Jun–Aug
Avg High 18°C
Avg Low 15°C
Rain 9 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 15°C
Avg Low 13°C
Rain 15 days/mo
Winter
Dec–Feb
Avg High 9°C
Avg Low 7°C
Rain 16 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: 9°C / 6°C . Feb: 9°C / 7°C . Mar: 10°C / 7°C . Apr: 11°C / 8°C . May: 14°C / 11°C . Jun: 16°C / 14°C . Jul: 18°C / 16°C . Aug: 19°C / 16°C . Sep: 18°C / 15°C . Oct: 15°C / 13°C . Nov: 12°C / 10°C . Dec: 10°C / 8°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 130 mm. Feb: 84 mm. Mar: 75 mm. Apr: 44 mm. May: 48 mm. Jun: 58 mm. Jul: 46 mm. Aug: 58 mm. Sep: 95 mm. Oct: 131 mm. Nov: 144 mm. Dec: 143 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 78%. Feb: 79%. Mar: 79%. Apr: 77%. May: 81%. Jun: 83%. Jul: 82%. Aug: 81%. Sep: 78%. Oct: 78%. Nov: 78%. Dec: 80%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 38 km/h . Feb: 38 km/h . Mar: 36 km/h . Apr: 31 km/h . May: 29 km/h . Jun: 27 km/h . Jul: 28 km/h . Aug: 29 km/h . Sep: 32 km/h . Oct: 36 km/h . Nov: 39 km/h . Dec: 40 km/h .
Sunshine
Sunshine
Sunshine: Jan: 4h. Feb: 6h. Mar: 8h. Apr: 11h. May: 12h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 10h. Oct: 7h. Nov: 6h. Dec: 4h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 9°C . Feb: 9°C . Mar: 9°C . Apr: 11°C . May: 14°C . Jun: 17°C . Jul: 19°C . Aug: 20°C . Sep: 19°C . Oct: 17°C . Nov: 14°C . Dec: 11°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 2. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 6. Aug: UV 6. Sep: UV 4. Oct: UV 3. Nov: UV 2. 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: 0 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: 0 days.
Climate Trends
Average highs have warmed by 0.8°C (1.4°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 | Aug 2025 · 19°C | Aug · 19°C |
| Coldest month | Jan 2025 · 5°C | Jan · 6°C |
| Wettest month | Jan 2025 · 183 mm | Nov · 144 mm |
| Windiest month | Dec 2025 · 40 km/h | Dec · 40 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor 
March
Poor April
Fair May
Fair June best
Good July best
Excellent August best
Excellent September
Fair October
Fair November
Wet December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 9°C / 6°C | 4°C / 0°C | 17days (130 mm) Wet | 4.3h Fair | 78% Humid | 1.4 Low | Poor | View Details |
| February | 9°C / 7°C | 4°C / 0°C | 14days (84 mm) Wet | 5.9h Fair | 79% Humid | 2 Low | Poor | View Details |
| March | 10°C / 7°C | 5°C / 1°C | 14days (75 mm) Wet | 8h Good | 79% Humid | 3.6 Moderate | Poor | View Details |
| April | 11°C / 8°C | 8°C / 3°C | 9days (44 mm) Wet | 10.6h Excellent | 77% Humid | 5.2 High | Fair | View Details |
| May | 14°C / 11°C | 12°C / 7°C | 9days (48 mm) Wet | 11.9h Excellent | 81% Humid | 6.2 High | Fair | View Details |
| June best | 16°C / 14°C | 16°C / 11°C | 10days (58 mm) Wet | 12.1h Excellent | 83% Humid | 6.6 High | Good | View Details |
| July best | 18°C / 16°C | 18°C / 13°C | 9days (46 mm) Wet | 12.4h Excellent | 82% Humid | 6.1 High | Excellent | View Details |
| August best | 19°C / 16°C | 18°C / 14°C | 9days (58 mm) Wet | 11.1h Excellent | 81% Humid | 5.8 High | Excellent | View Details |
| September | 18°C / 15°C | 16°C / 12°C | 12days (95 mm) Wet | 9.5h Good | 78% Humid | 4.3 Moderate | Fair | View Details |
| October | 15°C / 13°C | 12°C / 9°C | 16days (131 mm) Wet | 7.3h Good | 78% Humid | 2.8 Moderate | Fair | View Details |
| November | 12°C / 10°C | 8°C / 4°C | 18days (144 mm) Wet | 5.5h Fair | 78% Humid | 1.6 Low | Wet | View Details |
| December | 10°C / 8°C | 5°C / 2°C | 17days (143 mm) Wet | 3.8h Poor | 80% Humid | 1.1 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Trinity are June, July, August, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Trinity, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Trinity is August, with average daytime highs of 19°C (65°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Trinity is January, with average overnight lows of 6°C (43°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Trinity is November, averaging 144mm of precipitation across 18 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Trinity runs through November, January, December, October, with the heaviest rainfall in November. Based on 10-year averages for Trinity.
Trinity receives approximately 102 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Trinity.
The least favorable months to visit Trinity are January, February, March, December, primarily due to very cold temperatures, heavy rainfall. For the best conditions, consider June, July, August instead.
The annual average UV index in Trinity is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Trinity is 80%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 14°C (57°F), which most swimmers will find too cold without a wetsuit.
Yes, Trinity receives snow. Months with snowfall average 1 snow days and 0 cm (0 in) of accumulation, with about 1 frost days during winter.
Average wind speeds in Trinity are 34 km/h (21 mph). The windiest month is December with peak winds reaching 40 km/h (25 mph) (gusts up to 55 km/h / 34 mph).
Trinity averages 3 clear-sky days per month with overall cloud cover around 64%. The clearest skies occur in April.
The annual average dew point in Trinity is 9°C (48°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Trinity 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 Trinity ranges from 6°C (43°F) to 10°C (50°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 Trinity. It earns a climate score of 7.3/10 with Good.
For June in Trinity, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Comfortable walking shoes. With average highs of 16°C (61°F) and 10 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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