Thomaston, United States experiences average highs of 23°C (73°F) and lows of 14°C (57°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 cooled by 0.9°C (1.6°F) across the available records.
Thomaston, United States Weather & Climate 2026
Monthly climate averages for Thomaston, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Mar–Aug At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.7/10
Best: April, May, October
UV Index
6
High
Temperature 23°C / 14°C
Feels Like 24°C / 14°C
Rainy Days 11
Rainfall 97 mm
Sunshine 9 h
Humidity 71%
Wind Speed 14 km/h
Dew Point 13°C
Snow Days 1 days
Frost Days 3 days
Hottest Month
32°C
July
Avg Low23°C
Rain18days
Coldest Month
4°C
January
Avg High13°C
Rain10days
Driest Month
6days
October
Avg High25°C
Avg Low15°C
Windiest Month
16 km/h
March (Gusts 40)
Worst Time to Visit
Consider avoiding January, July, August due to frequent rain.
Sun Position
Sunrise 06:30
Daylight 14.3h
Sunset 20:48
Live conditions—
Thomaston on the map · live conditions
Thomaston, United States
- Continent
- Americas
- Country
- United States
- City
- Thomaston
- Population
- 9K
- Elevation
- 230 m
- Coordinates
- 32.89°, -84.33°
Seasonal Breakdown
Spring
Mar–May
Avg High 24°C
Avg Low 13°C
Rain 10 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 31°C
Avg Low 22°C
Rain 16 days/mo
Autumn
Sep–Nov
Avg High 24°C
Avg Low 15°C
Rain 6 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 15°C
Avg Low 6°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: 13°C / 4°C . Feb: 17°C / 8°C . Mar: 20°C / 10°C . Apr: 23°C / 13°C . May: 27°C / 17°C . Jun: 31°C / 21°C . Jul: 32°C / 23°C . Aug: 31°C / 22°C . Sep: 29°C / 20°C . Oct: 25°C / 15°C . Nov: 19°C / 9°C . Dec: 15°C / 6°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 119 mm. Feb: 101 mm. Mar: 96 mm. Apr: 96 mm. May: 94 mm. Jun: 99 mm. Jul: 108 mm. Aug: 112 mm. Sep: 89 mm. Oct: 70 mm. Nov: 72 mm. Dec: 112 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 71%. Feb: 73%. Mar: 68%. Apr: 66%. May: 68%. Jun: 71%. Jul: 75%. Aug: 76%. Sep: 69%. Oct: 67%. Nov: 69%. Dec: 75%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 16 km/h . Feb: 16 km/h . Mar: 16 km/h . Apr: 16 km/h . May: 14 km/h . Jun: 12 km/h . Jul: 11 km/h . Aug: 11 km/h . Sep: 12 km/h . Oct: 13 km/h . Nov: 14 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 7h. Mar: 8h. Apr: 10h. May: 11h. Jun: 11h. Jul: 12h. Aug: 11h. Sep: 10h. Oct: 9h. Nov: 7h. Dec: 6h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 4. Feb: UV 5. Mar: UV 6. Apr: UV 7. May: UV 7. Jun: UV 8. Jul: UV 8. Aug: UV 8. Sep: UV 7. 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: 1 days. Feb: 0 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 cooled by 0.9°C (1.6°F) across the available records. Average rainfall is trending wetter by about 17 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 33°C | Jul · 32°C |
| Coldest month | Jan 2025 · 1°C | Jan · 4°C |
| Wettest month | Aug 2025 · 159 mm | Jan · 119 mm |
| Windiest month | Mar 2025 · 18 km/h | Mar · 16 km/h |
Month-by-Month Weather Table
January
Fair 
February
Good March
Good April best
Excellent May best
Excellent June
Fair July
Wet August
Fair September
Good October best
Excellent November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 13°C / 4°C | 11°C / 1°C | 10days (119 mm) Wet | 6.7h Fair | 71% Muggy | 3.6 Moderate | Fair | View Details |
| February | 17°C / 8°C | 16°C / 5°C | 10days (101 mm) Wet | 6.8h Fair | 73% Muggy | 4.5 Moderate | Good | View Details |
| March | 20°C / 10°C | 19°C / 7°C | 11days (96 mm) Wet | 8.4h Good | 68% Muggy | 5.8 High | Good | View Details |
| April best | 23°C / 13°C | 24°C / 11°C | 8days (96 mm) Wet | 10h Excellent | 66% Muggy | 7.3 Very High | Excellent | View Details |
| May best | 27°C / 17°C | 29°C / 18°C | 11days (94 mm) Wet | 10.7h Excellent | 68% Muggy | 7.4 Very High | Excellent | View Details |
| June | 31°C / 21°C | 34°C / 23°C | 13days (99 mm) Wet | 11.3h Excellent | 71% Muggy | 8.2 Very High | Fair | View Details |
| July | 32°C / 23°C | 37°C / 26°C | 18days (108 mm) Wet | 11.6h Excellent | 75% Muggy | 8.1 Very High | Wet | View Details |
| August | 31°C / 22°C | 35°C / 26°C | 16days (112 mm) Wet | 10.6h Excellent | 76% Humid | 7.6 Very High | Fair | View Details |
| September | 29°C / 20°C | 32°C / 22°C | 7days (89 mm) Good | 9.9h Good | 69% Muggy | 6.7 High | Good | View Details |
| October best | 25°C / 15°C | 25°C / 14°C | 6days (70 mm) Good | 8.8h Good | 67% Muggy | 5.4 High | Excellent | View Details |
| November | 19°C / 9°C | 18°C / 7°C | 6days (72 mm) Good | 7.4h Good | 69% Muggy | 4 Moderate | Good | View Details |
| December | 15°C / 6°C | 13°C / 4°C | 10days (112 mm) Wet | 5.9h Fair | 75% Muggy | 3.2 Moderate | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Thomaston are April, May, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Thomaston, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Thomaston is July, with average daytime highs of 32°C (89°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Thomaston is January, with average overnight lows of 4°C (39°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Thomaston is January, averaging 119mm of precipitation across 10 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Thomaston runs through July, August, June, March, with the heaviest rainfall in July. Based on 10-year averages for Thomaston.
Thomaston receives approximately 108 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Thomaston.
The least favorable months to visit Thomaston are January, July, August, primarily due to frequent rain. For the best conditions, consider April, May, October instead.
The annual average UV index in Thomaston is 6, classified as high. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Thomaston is 71%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Thomaston receives snow. Months with snowfall average 1 snow days and 1 cm (0 in) of accumulation, with about 3 frost days during winter.
Average wind speeds in Thomaston are 14 km/h (9 mph). The windiest month is March with peak winds reaching 16 km/h (10 mph) (gusts up to 40 km/h / 25 mph).
Thomaston averages 6 clear-sky days per month with overall cloud cover around 55%. The clearest skies occur in October.
The annual average dew point in Thomaston is 13°C (55°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Thomaston 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 Thomaston ranges from 14°C (57°F) to 24°C (75°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
June is not the best time to visit Thomaston, with a climate score of 6.1/10. Consider visiting during April, May, October instead for better conditions.
For June in Thomaston, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 31°C (87°F) and 13 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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