Cary, United States experiences average highs of 21°C (70°F) and lows of 12°C (54°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 stayed broadly stable across the available records.
Cary, United States Weather & Climate 2026
Monthly climate averages for Cary, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Aug At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.2/10
Best: April, May, September, October
UV Index
6
High
Temperature 21°C / 12°C
Feels Like 22°C / 11°C
Rainy Days 11
Rainfall 102 mm
Sunshine 9 h
Humidity 71%
Wind Speed 15 km/h
Dew Point 12°C
Frost Days 6 days
Hottest Month
31°C
July
Avg Low23°C
Rain16days
Coldest Month
2°C
January
Avg High10°C
Rain9days
Driest Month
7days
October
Avg High22°C
Avg Low13°C
Windiest Month
18 km/h
March (Gusts 41)
Worst Time to Visit
Consider avoiding January, July, December due to frequent rain.
Sun Position
Sunrise 06:00
Daylight 14.6h
Sunset 20:34
Live conditions—
Cary on the map · live conditions
Cary, United States
- Continent
- Americas
- Country
- United States
- City
- Cary
- Population
- 159.8K
- Elevation
- 152 m
- Coordinates
- 35.79°, -78.78°
Seasonal Breakdown
Spring
Mar–May
Avg High 22°C
Avg Low 11°C
Rain 10 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 30°C
Avg Low 21°C
Rain 14 days/mo
Autumn
Sep–Nov
Avg High 22°C
Avg Low 13°C
Rain 8 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 12°C
Avg Low 3°C
Rain 9 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: 10°C / 2°C . Feb: 14°C / 4°C . Mar: 17°C / 7°C . Apr: 22°C / 11°C . May: 26°C / 16°C . Jun: 29°C / 20°C . Jul: 31°C / 23°C . Aug: 30°C / 22°C . Sep: 27°C / 19°C . Oct: 22°C / 13°C . Nov: 16°C / 7°C . Dec: 12°C / 4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 102 mm. Feb: 91 mm. Mar: 88 mm. Apr: 102 mm. May: 109 mm. Jun: 99 mm. Jul: 129 mm. Aug: 135 mm. Sep: 138 mm. Oct: 72 mm. Nov: 72 mm. Dec: 92 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 69%. Feb: 71%. Mar: 65%. Apr: 64%. May: 69%. Jun: 71%. Jul: 75%. Aug: 77%. Sep: 76%. Oct: 73%. Nov: 69%. Dec: 72%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 16 km/h . Feb: 17 km/h . Mar: 18 km/h . Apr: 18 km/h . May: 15 km/h . Jun: 13 km/h . Jul: 12 km/h . Aug: 12 km/h . Sep: 13 km/h . Oct: 14 km/h . Nov: 15 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 7h. Feb: 7h. Mar: 8h. Apr: 10h. May: 10h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 9h. Oct: 8h. Nov: 8h. Dec: 6h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 4. Feb: UV 5. Mar: UV 6. Apr: UV 8. May: UV 8. Jun: UV 9. Jul: UV 9. 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
Month-by-Month Weather Table
January
Poor 
February
Fair March
Fair April best
Excellent May best
Excellent June
Good July
Poor August
Fair September best
Excellent October best
Excellent November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 10°C / 2°C | 7°C / -2°C | 9days (102 mm) Wet | 6.7h Fair | 69% Muggy | 3.7 Moderate | Poor | View Details |
| February | 14°C / 4°C | 12°C / 1°C | 10days (91 mm) Wet | 6.8h Fair | 71% Muggy | 4.5 Moderate | Fair | View Details |
| March | 17°C / 7°C | 15°C / 4°C | 10days (88 mm) Wet | 8.4h Good | 65% Muggy | 6.4 High | Fair | View Details |
| April best | 22°C / 11°C | 21°C / 9°C | 9days (102 mm) Wet | 10h Excellent | 64% Muggy | 8.2 Very High | Excellent | View Details |
| May best | 26°C / 16°C | 27°C / 16°C | 12days (109 mm) Wet | 10.1h Excellent | 69% Muggy | 8.2 Very High | Excellent | View Details |
| June | 29°C / 20°C | 32°C / 22°C | 12days (99 mm) Wet | 11.7h Excellent | 71% Muggy | 9.1 Very High | Good | View Details |
| July | 31°C / 23°C | 36°C / 26°C | 16days (129 mm) Wet | 11.7h Excellent | 75% Muggy | 8.8 Very High | Poor | View Details |
| August | 30°C / 22°C | 34°C / 24°C | 15days (135 mm) Wet | 10.5h Excellent | 77% Humid | 7.8 Very High | Fair | View Details |
| September best | 27°C / 19°C | 30°C / 20°C | 10days (138 mm) Wet | 9.3h Good | 76% Humid | 6.6 High | Excellent | View Details |
| October best | 22°C / 13°C | 22°C / 13°C | 7days (72 mm) Good | 8.4h Good | 73% Muggy | 5.4 High | Excellent | View Details |
| November | 16°C / 7°C | 15°C / 5°C | 7days (72 mm) Good | 7.6h Good | 69% Muggy | 4.2 Moderate | Fair | View Details |
| December | 12°C / 4°C | 10°C / 0°C | 9days (92 mm) Wet | 6.4h Fair | 72% Muggy | 3.2 Moderate | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Cary are April, May, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Cary, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Cary is July, with average daytime highs of 31°C (88°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Cary is January, with average overnight lows of 2°C (35°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Cary is September, averaging 138mm of precipitation across 10 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Cary runs through July, August, May, June, with the heaviest rainfall in July. Based on 10-year averages for Cary.
Cary receives approximately 108 sunshine hours per year. The sunniest month is June with around 12 hours. Based on climate data for Cary.
The least favorable months to visit Cary are January, July, December, primarily due to frequent rain. For the best conditions, consider April, May, September, October instead.
The annual average UV index in Cary is 6, classified as high. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Cary is 71%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Cary rarely sees significant snowfall but does experience frost, averaging 6 frost days during the colder months.
Average wind speeds in Cary are 15 km/h (9 mph). The windiest month is March with peak winds reaching 18 km/h (11 mph) (gusts up to 41 km/h / 25 mph).
Cary 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 Cary is 12°C (54°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Cary 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 Cary ranges from 11°C (52°F) to 22°C (72°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 Cary. It earns a climate score of 7/10 with Good.
For June in Cary, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 29°C (85°F) and 12 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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