NYC Heat Wave Forecast: Approaching Third Heat Wave of 2025

Weekend Weather Outlook

• ☀️ Expect a warm start to Sunday with temperatures already around 70°F in the city.
• 🌡️ The afternoon high is forecast to reach 88°F, with some areas in New Jersey potentially hitting 90°F.
• 💨 Humidity will be tolerable for Sunday, but will increase later in the week.

Air Quality Concerns

• ⚠️ Air quality alerts are in effect for the lower Hudson Valley and all five boroughs due to ground-level ozone.
• 😷 Sensitive groups may experience unhealthy air quality, though this is unrelated to wildfire smoke.

Midweek Heat Wave Potential

• 📈 Monday is expected to reach 90°F in the city, and potentially higher inland.
• 🔥 The forecast indicates a strong possibility of NYC's third heat wave of the season starting mid-week.
• 🥵 While not as extreme as previous heat waves, temperatures are expected to reach the low 90s from Tuesday through Thursday.
• 💧 Humidity will begin to make the heat feel more oppressive by Tuesday and Wednesday.

Summer Heat Trends

• 📊 So far this season, there have been 11 days with temperatures at or above 90°F.
• 📈 The current summer is characterized by heat waves occurring in short bursts of 3-4 days, rather than prolonged periods.
• ⏳ Daylight hours are decreasing, with sunsets occurring around 8:00 PM, and about 2 minutes of daylight lost each day.