Clay, United States experiences average highs of 14°C (57°F) and lows of 6°C (43°F) throughout the year. Rainfall is frequent, averaging about 14 rainy days per month. Average highs have cooled by 0.8°C (1.4°F) across the available records.
Clay, United States Weather & Climate 2026
Monthly climate averages for Clay, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Mar–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, September
UV Index
4
Low
Temperature 14°C / 6°C
Feels Like 13°C / 4°C
Rainy Days 14
Rainfall 109 mm
Sunshine 8 h
Humidity 75%
Wind Speed 17 km/h
Dew Point 6°C
Snow Days 12 days
Frost Days 18 days
Hottest Month
27°C
July
Avg Low19°C
Rain13days
Coldest Month
-6°C
January
Avg High0°C
Rain16days
Driest Month
9days
September
Avg High23°C
Avg Low15°C
Windiest Month
20 km/h
February (Gusts 44)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 05:26
Daylight 15.4h
Sunset 20:47
Live conditions—
Clay on the map · live conditions
Clay, United States
- Continent
- Americas
- Country
- United States
- City
- Clay
- Population
- 58.2K
- Elevation
- 120 m
- Coordinates
- 43.19°, -76.17°
Seasonal Breakdown
Spring
Mar–May
Avg High 13°C
Avg Low 4°C
Rain 14 days/mo
Summer
Jun–Aug
Avg High 26°C
Avg Low 18°C
Rain 13 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 16°C
Avg Low 9°C
Rain 13 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 2°C
Avg Low -5°C
Rain 17 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: 0°C / -6°C . Feb: 3°C / -6°C . Mar: 7°C / -2°C . Apr: 13°C / 4°C . May: 19°C / 10°C . Jun: 24°C / 15°C . Jul: 27°C / 19°C . Aug: 26°C / 18°C . Sep: 23°C / 15°C . Oct: 16°C / 9°C . Nov: 8°C / 2°C . Dec: 3°C / -3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 100 mm. Feb: 94 mm. Mar: 91 mm. Apr: 120 mm. May: 103 mm. Jun: 105 mm. Jul: 131 mm. Aug: 122 mm. Sep: 80 mm. Oct: 136 mm. Nov: 106 mm. Dec: 114 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 74%. Mar: 71%. Apr: 71%. May: 75%. Jun: 74%. Jul: 76%. Aug: 78%. Sep: 78%. Oct: 77%. Nov: 76%. Dec: 78%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 19 km/h . Feb: 20 km/h . Mar: 20 km/h . Apr: 19 km/h . May: 15 km/h . Jun: 15 km/h . Jul: 13 km/h . Aug: 13 km/h . Sep: 13 km/h . Oct: 17 km/h . Nov: 20 km/h . Dec: 20 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 6h. Mar: 7h. Apr: 8h. May: 10h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 9h. Oct: 7h. Nov: 5h. Dec: 4h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 6. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 19 days. Feb: 15 days. Mar: 9 days. Apr: 4 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 7 days. Dec: 17 days.
Climate Trends
Average highs have cooled by 0.8°C (1.4°F) across the available records. Average rainfall is trending wetter by about 12 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 28°C | Jul · 27°C |
| Coldest month | Jan 2025 · -8°C | Jan · -6°C |
| Wettest month | May 2025 · 166 mm | Oct · 136 mm |
| Windiest month | Dec 2025 · 22 km/h | Feb · 20 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Poor December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 0°C / -6°C | -4°C / -11°C | 16days (100 mm) Wet | 4.5h Fair | 76% Humid | 2 Low | Poor | View Details |
| February | 3°C / -6°C | -2°C / -11°C | 15days (94 mm) Wet | 5.7h Fair | 74% Muggy | 2.9 Moderate | Poor | View Details |
| March | 7°C / -2°C | 3°C / -7°C | 14days (91 mm) Wet | 7.2h Good | 71% Muggy | 4.1 Moderate | Poor | View Details |
| April | 13°C / 4°C | 10°C / 0°C | 15days (120 mm) Wet | 8.3h Good | 71% Muggy | 4.7 Moderate | Poor | View Details |
| May | 19°C / 10°C | 19°C / 8°C | 13days (103 mm) Wet | 10.1h Excellent | 75% Muggy | 5.5 High | Good | View Details |
| June best | 24°C / 15°C | 26°C / 15°C | 13days (105 mm) Wet | 11.5h Excellent | 74% Muggy | 6.4 High | Excellent | View Details |
| July best | 27°C / 19°C | 30°C / 20°C | 13days (131 mm) Wet | 12h Excellent | 76% Humid | 6.9 High | Excellent | View Details |
| August best | 26°C / 18°C | 28°C / 19°C | 13days (122 mm) Wet | 10.9h Excellent | 78% Humid | 5.9 High | Excellent | View Details |
| September best | 23°C / 15°C | 23°C / 14°C | 9days (80 mm) Wet | 9.3h Good | 78% Humid | 5 Moderate | Excellent | View Details |
| October | 16°C / 9°C | 15°C / 7°C | 15days (136 mm) Wet | 6.8h Fair | 77% Humid | 3.3 Moderate | Fair | View Details |
| November | 8°C / 2°C | 5°C / -2°C | 16days (106 mm) Wet | 5.3h Fair | 76% Humid | 2.2 Moderate | Poor | View Details |
| December | 3°C / -3°C | -1°C / -8°C | 19days (114 mm) Wet | 4.2h Fair | 78% Humid | 1.6 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Clay are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Clay, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Clay is July, with average daytime highs of 27°C (81°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Clay is January, with average overnight lows of -6°C (21°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Clay is October, averaging 136mm of precipitation across 15 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Clay runs through December, January, November, February, with the heaviest rainfall in December. Based on 10-year averages for Clay.
Clay receives approximately 96 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Clay.
The least favorable months to visit Clay are January, February, March, December, primarily due to very cold temperatures, heavy rainfall. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Clay is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Clay is 75%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Clay receives snow. Months with snowfall average 12 snow days and 23 cm (9 in) of accumulation, with about 18 frost days during winter.
Average wind speeds in Clay are 17 km/h (11 mph). The windiest month is February with peak winds reaching 20 km/h (12 mph) (gusts up to 44 km/h / 27 mph).
Clay averages 3 clear-sky days per month with overall cloud cover around 66%. The clearest skies occur in September.
The annual average dew point in Clay is 6°C (43°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Clay 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 Clay ranges from 4°C (39°F) to 13°C (55°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 Clay. It earns a climate score of 8.4/10 with Excellent.
For June in Clay, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 24°C (76°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.
Last updated: