Ithaca, United States experiences average highs of 15°C (59°F) and lows of 7°C (45°F) throughout the year. Rainfall is frequent, averaging about 13 rainy days per month. Average highs have cooled by 0.7°C (1.3°F) across the available records.
Ithaca, United States Weather & Climate 2026
Monthly climate averages for Ithaca, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Oct 
Wetter season: Apr–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.9/10
Best: May, June, July, August, September
UV Index
4
Low
Temperature 15°C / 7°C
Feels Like 14°C / 5°C
Rainy Days 13
Rainfall 97 mm
Sunshine 8 h
Humidity 75%
Wind Speed 16 km/h
Dew Point 7°C
Snow Days 12 days
Frost Days 16 days
Hottest Month
28°C
July
Avg Low19°C
Rain13days
Coldest Month
-5°C
January
Avg High2°C
Rain13days
Driest Month
9days
September
Avg High24°C
Avg Low15°C
Windiest Month
19 km/h
March (Gusts 46)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 05:30
Daylight 15.3h
Sunset 20:46
Live conditions—
Ithaca on the map · live conditions
Ithaca, United States
- Continent
- Americas
- Country
- United States
- City
- Ithaca
- Population
- 30.8K
- Elevation
- 125 m
- Coordinates
- 42.44°, -76.50°
Seasonal Breakdown
Spring
Mar–May
Avg High 15°C
Avg Low 5°C
Rain 14 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 27°C
Avg Low 18°C
Rain 12 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 17°C
Avg Low 9°C
Rain 12 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 3°C
Avg Low -4°C
Rain 13 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: 2°C / -5°C . Feb: 4°C / -5°C . Mar: 9°C / -1°C . Apr: 15°C / 5°C . May: 21°C / 11°C . Jun: 25°C / 16°C . Jul: 28°C / 19°C . Aug: 27°C / 19°C . Sep: 24°C / 15°C . Oct: 17°C / 10°C . Nov: 9°C / 3°C . Dec: 4°C / -2°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 83 mm. Feb: 82 mm. Mar: 85 mm. Apr: 114 mm. May: 103 mm. Jun: 98 mm. Jul: 107 mm. Aug: 105 mm. Sep: 88 mm. Oct: 118 mm. Nov: 86 mm. Dec: 93 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 74%. Mar: 70%. Apr: 71%. May: 75%. Jun: 74%. Jul: 75%. Aug: 76%. Sep: 78%. Oct: 78%. Nov: 76%. Dec: 78%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 19 km/h . Feb: 19 km/h . Mar: 19 km/h . Apr: 18 km/h . May: 15 km/h . Jun: 15 km/h . Jul: 13 km/h . Aug: 13 km/h . Sep: 13 km/h . Oct: 16 km/h . Nov: 18 km/h . Dec: 19 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 6h. Mar: 7h. Apr: 8h. May: 10h. Jun: 11h. 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: 18 days. Feb: 14 days. Mar: 10 days. Apr: 6 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 8 days. Dec: 17 days.
Climate Trends
Average highs have cooled by 0.7°C (1.3°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 30°C | Jul · 28°C |
| Coldest month | Jan 2025 · -8°C | Jan · -5°C |
| Wettest month | May 2025 · 153 mm | Oct · 118 mm |
| Windiest month | Dec 2025 · 22 km/h | Mar · 19 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May best
Good June best
Excellent July best
Good August best
Excellent September best
Excellent October
Good November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 2°C / -5°C | -3°C / -10°C | 13days (83 mm) Wet | 4.7h Fair | 76% Humid | 2.1 Moderate | Poor | View Details |
| February | 4°C / -5°C | 0°C / -10°C | 12days (82 mm) Wet | 5.8h Fair | 74% Muggy | 3.2 Moderate | Poor | View Details |
| March | 9°C / -1°C | 5°C / -5°C | 13days (85 mm) Wet | 7.2h Good | 70% Muggy | 4.2 Moderate | Poor | View Details |
| April | 15°C / 5°C | 12°C / 1°C | 15days (114 mm) Wet | 8.1h Good | 71% Muggy | 4.7 Moderate | Poor | View Details |
| May best | 21°C / 11°C | 21°C / 9°C | 14days (103 mm) Wet | 9.6h Good | 75% Muggy | 5.6 High | Good | View Details |
| June best | 25°C / 16°C | 27°C / 16°C | 12days (98 mm) Wet | 11.4h Excellent | 74% Muggy | 6.4 High | Excellent | View Details |
| July best | 28°C / 19°C | 31°C / 21°C | 13days (107 mm) Wet | 11.8h Excellent | 75% Muggy | 7 High | Good | View Details |
| August best | 27°C / 19°C | 29°C / 20°C | 12days (105 mm) Wet | 10.6h Excellent | 76% Humid | 5.9 High | Excellent | View Details |
| September best | 24°C / 15°C | 24°C / 15°C | 9days (88 mm) Wet | 8.9h Good | 78% Humid | 4.9 Moderate | Excellent | View Details |
| October | 17°C / 10°C | 16°C / 8°C | 12days (118 mm) Wet | 6.8h Fair | 78% Humid | 3.4 Moderate | Good | View Details |
| November | 9°C / 3°C | 6°C / -1°C | 14days (86 mm) Wet | 5.4h Fair | 76% Humid | 2.3 Moderate | Poor | View Details |
| December | 4°C / -2°C | 0°C / -7°C | 15days (93 mm) Wet | 4.4h Fair | 78% Humid | 1.7 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Ithaca are May, June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Ithaca, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Ithaca is July, with average daytime highs of 28°C (83°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Ithaca is January, with average overnight lows of -5°C (22°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Ithaca is October, averaging 118mm of precipitation across 12 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Ithaca runs through April, December, May, November, with the heaviest rainfall in April. Based on 10-year averages for Ithaca.
Ithaca receives approximately 95 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Ithaca.
The least favorable months to visit Ithaca are January, February, March, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Ithaca is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Ithaca is 75%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Ithaca receives snow. Months with snowfall average 12 snow days and 22 cm (9 in) of accumulation, with about 16 frost days during winter.
Average wind speeds in Ithaca are 16 km/h (10 mph). The windiest month is March with peak winds reaching 19 km/h (12 mph) (gusts up to 46 km/h / 29 mph).
Ithaca averages 2 clear-sky days per month with overall cloud cover around 67%. The clearest skies occur in September.
The annual average dew point in Ithaca is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Ithaca 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 Ithaca ranges from 5°C (41°F) to 14°C (57°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 Ithaca. It earns a climate score of 8.4/10 with Excellent.
For June in Ithaca, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 25°C (78°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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