Monthly weather averages & travel planning

North America › 🇺🇸 United States › New York
Updated: March 2026
August is a good time to visit New York (6/10). With 11 daily sunshine hours and only 11 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 3rd sunniest of the year in New York. Culture-focused travellers and those who prefer lighter crowds will find August a practical choice, with prices running lower than peak July without sacrificing all the good weather. September offers a similar profile at lower hotel rates if dates are flexible. The main practical note: New York's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.
August weather in New York is defined by a daily temperature swing from 20°C at night to 28°C during the afternoon. Humidity averages 65%, and you can count on around 11 sunshine hours each day. That combination makes August warm and lush, though dressing in breathable fabrics keeps things manageable.
28°C
82°F
Avg High
20°C
68°F
Avg Low
11 days
105 mm total
Rain Days
11h
per day avg
Sunshine
65%
Moderate
Humidity
The 8°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. UV index averages 9 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Wind averages 15 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 82°F average high, 68°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Packing for New York in August means dressing for 28°C days and 20°C evenings. A light cotton tee with a casual overshirt works well at 28°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 20°C, a modest 8°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. A compact foldable umbrella weighs almost nothing and earns its keep across 11 potential rainy days.
Local tip: Layers are more practical than a single heavy garment in New York. The day-to-evening temperature shift rewards packing a versatile mid-layer you can add or remove as conditions change.
August has no major festivals or public holidays in New York, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
Based on 28°C average highs and 11 rainy days
August in New York reflects a mid-latitude climate pattern, with temperatures averaging 28°C by day and 20°C overnight. The city sits at 41 degrees north latitude, where the balance between solar radiation and heat loss drives conditions that are neither extreme nor static. The warm temperatures reflect a stable high-pressure pattern typical of the season, which suppresses cloud formation and concentrates solar energy at the surface. Day-to-night temperature variation of 8°C is moderate and manageable with a single mid-layer. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
New York in August
August ranks 3rd sunniest of the year in New York, with an average 11 daily sunshine hours. The driest months are November, January, and February. July is the hottest month (29°C avg high); January is the coolest (4°C). From here, temperatures fall 4°C into September. Compared to last month (July: 29°C high, 12 rain days), August is cooler and drier. August is among the top three sunniest months to visit New York.
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 4°C | -4°C | 9 | 7h | View |
| February | 5°C | -4°C | 9 | 7h | View |
| March | 9°C | 0°C | 10 | 8h | View |
| April | 15°C | 6°C | 11 | 9h | View |
| May | 21°C | 11°C | 11 | 10h | View |
| June | 26°C | 17°C | 11 | 11h | View |
| July | 29°C | 20°C | 12 | 12h | View |
| August | 28°C | 20°C | 11 | 11h | View |
| September | 24°C | 16°C | 9 | 9h | View |
| October | 18°C | 10°C | 9 | 8h | View |
| November | 12°C | 4°C | 8 | 7h | View |
| December | 6°C | -1°C | 10 | 6h | View |
January
9 rain days, 7h sun
February
9 rain days, 7h sun
March
10 rain days, 8h sun
April
11 rain days, 9h sun
May
11 rain days, 10h sun
June
11 rain days, 11h sun
July
12 rain days, 12h sun
August
11 rain days, 11h sun
September
9 rain days, 9h sun
October
9 rain days, 8h sun
November
8 rain days, 7h sun
December
10 rain days, 6h sun
Cities within 500 km with comparable weather conditions
Data Sources for New York
Climate normals represent 30-year averages (1991-2020). Individual years may vary.