Monthly climate averages for Millbrook, United States. Based on 10-year ERA5 reanalysis data.
Cfa Humid Subtropical
Climate OverviewMillbrook, United States in December has mild conditions, with highs averaging 15.8°C (60°F) and noticeably cooler mornings. Rain falls on about 10 days this month.
This month falls at the beginning of Winter.
Temperatures remain fairly steady throughout December, with daily highs around 16°C (61°F).
December sees fairly even rainfall, totalling about 114 mm across the month.
The warmest days tend to fall around the 29th, averaging 16.9°C (62°F).
Compared to November, this month is about 4°C cooler with 3 more rainy days.
Daily averages based on historical data (2016–2025)
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 14°C / 5°C | 12°C / 2°C | 11days (137 mm) Wet | 6.7h Fair | 74% Muggy | 3.6 Moderate | Fair | View Details |
| February | 18°C / 8°C | 17°C / 6°C | 10days (113 mm) Wet | 6.7h Fair | 75% Muggy | 4.6 Moderate | Good | View Details |
| March | 21°C / 10°C | 21°C / 9°C | 11days (114 mm) Wet | 8.3h Good | 72% Muggy | 5.8 High | Good | View Details |
| April best | 24°C / 13°C | 25°C / 12°C | 8days (109 mm) Wet | 9.9h Good | 69% Muggy | 7.4 Very High | Excellent | View Details |
| May best | 29°C / 18°C | 31°C / 19°C | 11days (118 mm) Wet | 10.8h Excellent | 71% Muggy | 7.6 Very High | Excellent | View Details |
| June | 31°C / 22°C | 36°C / 25°C | 12days (108 mm) Wet | 11.1h Excellent | 73% Muggy | 8.3 Very High | Fair | View Details |
| July | 33°C / 24°C | 38°C / 28°C | 14days (88 mm) Wet | 11.6h Excellent | 74% Muggy | 8.2 Very High | Poor | View Details |
| August | 33°C / 24°C | 37°C / 28°C | 14days (82 mm) Wet | 10.7h Excellent | 72% Muggy | 7.8 Very High | Poor | View Details |
| September best | 31°C / 21°C | 34°C / 24°C | 7days (72 mm) Good | 10h Excellent | 67% Muggy | 6.7 High | Excellent | View Details |
| October best | 26°C / 16°C | 27°C / 16°C | 5days (69 mm) Good | 8.9h Good | 66% Muggy | 5.5 High | Excellent | View Details |
| November | 20°C / 10°C | 19°C / 8°C | 7days (79 mm) Good | 7.5h Good | 71% Muggy | 4.1 Moderate | Good | View Details |
| December | 16°C / 7°C | 14°C / 5°C | 10days (115 mm) Wet | 5.9h Fair | 77% Humid | 3.4 Moderate | Fair | View Details |
Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.
A waterproof jacket or compact umbrella is recommended for occasional showers.
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