Trinity, United States — Weather in December 2026

Monthly climate averages for Trinity, United States. Based on 10-year ERA5 reanalysis data.

Cfa Humid Subtropical
8.5 /10
Excellent

December is an excellent month in Trinity

Climate Overview

Trinity, United States in December has warm conditions, with highs averaging 21.1°C (70°F). Sea temperature stays cool at 18.3°C (65°F).

This month falls at the beginning of Winter.

Temperatures remain fairly steady throughout December, with daily highs around 21°C (70°F).

Rainfall is heaviest during the middle of the month, while the first third tends to be drier.

Expect around 8.9h of sunshine at the start of December, decreasing to 8.3h by the end.

The warmest days tend to fall around the 15th, averaging 22°C (72°F).

Compared to November, this month is about 3°C cooler with 0 fewer rainy days. Temperatures begin dropping heading into January.

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Monthly December Averages

Temperature
21°C / 15°C
Feels Like
21°C / 13°C
Rain
5 days · 49 mm
Sunshine
8.2h / day
Humidity
77% — Humid
Wind
24 km/h
Wind Direction
NE (44°)
Gusts
35 km/h
Daylight
10.4 h
Cloud Cover
51%
Clear Sky Days
6.3
UV Index
4.3 — Moderate
Sea Temperature
18°C
Dew Point
14°C — Comfortable
Moon Phase
Waxing Crescent · 31%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

28°C 25°C 22°C 19°C 16°C 13°C 10°C 151015202531
HighLow

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 151015202531
Rainfall

Daily Sunshine

0h 3h 6h 9h 12h 151015202531
Sunshine

Daily Wind Speed

0 7 14 21 28 35 151015202531
Wind Speed
Sun Position
Sunrise 07:16
Daylight 10.4h
Sunset 17:38

What to Expect

Daytime temperatures around 21°C (70°F) are ideal for full-day outdoor exploration.

Rain is uncommon in this month, so most days stay dry from morning through evening.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Good
Temp
19°C / 13°C
Feels Like
18°C / 9°C
Rain
7days (64 mm) Good
Sun
8.2h Good
Humidity
74% Muggy
UV
4.6 Moderate
View Details
February best
Excellent
Temp
22°C / 15°C
Feels Like
22°C / 14°C
Rain
5days (61 mm) Good
Sun
9.3h Good
Humidity
79% Humid
UV
5.8 High
View Details
March best
Excellent
Temp
23°C / 17°C
Feels Like
24°C / 16°C
Rain
5days (41 mm) Good
Sun
10.2h Excellent
Humidity
73% Muggy
UV
7.2 Very High
View Details
April best
Excellent
Temp
26°C / 20°C
Feels Like
28°C / 19°C
Rain
6days (54 mm) Good
Sun
11.1h Excellent
Humidity
70% Muggy
UV
8.2 Very High
View Details
May
Good
Temp
29°C / 22°C
Feels Like
32°C / 24°C
Rain
8days (85 mm) Wet
Sun
11.8h Excellent
Humidity
72% Muggy
UV
8.5 Very High
View Details
June
Wet
Temp
30°C / 25°C
Feels Like
35°C / 28°C
Rain
18days (139 mm) Wet
Sun
11.4h Excellent
Humidity
79% Humid
UV
8.4 Very High
View Details
July
Wet
Temp
30°C / 26°C
Feels Like
36°C / 30°C
Rain
22days (164 mm) Wet
Sun
11.2h Excellent
Humidity
81% Humid
UV
8.3 Very High
View Details
August
Wet
Temp
30°C / 26°C
Feels Like
36°C / 30°C
Rain
21days (204 mm) Wet
Sun
10.4h Excellent
Humidity
81% Humid
UV
8 Very High
View Details
September
Wet
Temp
29°C / 25°C
Feels Like
34°C / 27°C
Rain
18days (146 mm) Wet
Sun
10h Excellent
Humidity
80% Humid
UV
7.4 Very High
View Details
October best
Excellent
Temp
27°C / 22°C
Feels Like
30°C / 22°C
Rain
8days (68 mm) Wet
Sun
9.7h Good
Humidity
76% Humid
UV
6.1 High
View Details
November best
Excellent
Temp
24°C / 18°C
Feels Like
24°C / 17°C
Rain
5days (34 mm) Good
Sun
8.8h Good
Humidity
75% Muggy
UV
5 Moderate
View Details
December
Excellent
Temp
21°C / 15°C
Feels Like
21°C / 13°C
Rain
5days (49 mm) Good
Sun
8.2h Good
Humidity
77% Humid
UV
4.3 Moderate
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 19°C / 13°C 18°C / 9°C 7days (64 mm) Good 8.2h Good 74% Muggy 4.6 Moderate Good View Details
February best 22°C / 15°C 22°C / 14°C 5days (61 mm) Good 9.3h Good 79% Humid 5.8 High Excellent View Details
March best 23°C / 17°C 24°C / 16°C 5days (41 mm) Good 10.2h Excellent 73% Muggy 7.2 Very High Excellent View Details
April best 26°C / 20°C 28°C / 19°C 6days (54 mm) Good 11.1h Excellent 70% Muggy 8.2 Very High Excellent View Details
May 29°C / 22°C 32°C / 24°C 8days (85 mm) Wet 11.8h Excellent 72% Muggy 8.5 Very High Good View Details
June 30°C / 25°C 35°C / 28°C 18days (139 mm) Wet 11.4h Excellent 79% Humid 8.4 Very High Wet View Details
July 30°C / 26°C 36°C / 30°C 22days (164 mm) Wet 11.2h Excellent 81% Humid 8.3 Very High Wet View Details
August 30°C / 26°C 36°C / 30°C 21days (204 mm) Wet 10.4h Excellent 81% Humid 8 Very High Wet View Details
September 29°C / 25°C 34°C / 27°C 18days (146 mm) Wet 10h Excellent 80% Humid 7.4 Very High Wet View Details
October best 27°C / 22°C 30°C / 22°C 8days (68 mm) Wet 9.7h Good 76% Humid 6.1 High Excellent View Details
November best 24°C / 18°C 24°C / 17°C 5days (34 mm) Good 8.8h Good 75% Muggy 5 Moderate Excellent View Details
December 21°C / 15°C 21°C / 13°C 5days (49 mm) Good 8.2h Good 77% Humid 4.3 Moderate Excellent View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

Packing List

Sunscreen (SPF 30+)SunglassesComfortable walking shoes

Frequently Asked Questions

December is typically excellent for visiting Trinity, with average highs of 21°C (70°F) and around 5 rainy days. Trinity, United States in December has warm conditions, with highs averaging 21.1°C (70°F). Sea temperature stays cool a
Trinity typically sees around 5 rainy days in December with 49 mm (1.9 in) of total rainfall. An umbrella should suffice.
Evenings in Trinity during December are mild at 15°C (59°F). A light cardigan is usually enough.
With highs of 21°C (70°F) and lows of 15°C (59°F) in December, we recommend: Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. Comfortable walking shoes are essential.
December is not the most favourable month weather-wise in Trinity. Consider visiting during months with milder temperatures or less rainfall for a better experience.
The average UV index in Trinity during December is 4 (moderate). Sunscreen and sunglasses are recommended during midday hours.
Trinity gets approximately 10 hours of daylight per day in December, with around 8 hours of sunshine.
Snow is uncommon in Trinity during December based on 10-year climate averages.

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