Oswego weather
At 7:15 PM local time it was cloudy and 14°C (56°F). Light rain for 1 of the next 24 hours (under 1 mm/h, 0.7 mm total) — cloudy, but fine to be out. Best months for weather: May–Oct. Oswego sits 196 m (643 ft) above sea level, which keeps it cooler than the coast. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Oswego, Illinois, United States.
Current conditions
- Clouds
- 100%
- Chance of rain
- 2%
- Rain
- 0.0 mm/h
Hourly Forecast
Light rain for 1 of the next 24 hours (under 1 mm/h, 0.7 mm total) — cloudy, but fine to be out
Daily Forecast
Best Time to Visit
Peak season May–OctOff season Nov–Mar
About Oswego weather
Is it raining in Oswego right now?
No. It’s cloudy and 14° right now. Light rain for 1 of the next 24 hours (under 1 mm/h, 0.7 mm total) — cloudy, but fine to be out.
What’s the weather like in Oswego this week?
Over the next 7 days, expect highs of 11–21° and lows of 8–15°. Rain is likely on 5 of 7 days (Sunday, Tuesday, Wednesday, Thursday, Friday). The driest day looks like Sunday.
Has it been raining in Oswego lately?
Barely. The past 7 days were mostly dry, with 0.3 mm of rain in total.
What should I pack for Oswego?
For the coming week, bring an umbrella or rain jacket and a warm layer for the evenings.
Oswego weather by month
When is the best time to visit Oswego?
Based on weather alone, the best time to visit Oswego is May–Oct, according to NASA's 2001–2025 climate averages. Nov–Mar tends to be the least pleasant. Average highs run from 0°C (31°F) in January to 29°C (84°F) in July.
What is the rainiest month in Oswego?
May is the wettest month, with about 117 mm (4.6 in) of rain on average. January is the driest, with about 48 mm (1.9 in).
What is the hottest month in Oswego?
July is the warmest, with average highs of 29°C (84°F) and lows of 18°C (65°F). January is the coolest, with highs of 0°C (31°F) and lows of -9°C (15°F).
Does Oswego have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is May at about 117 mm (4.6 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months