See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:34
Sunrise
18:47
Sunset
Moon
Waxing Crescent
12:32
Moonrise
20:46
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
Upgrade to access real-time air quality data for Grafton.
Resources
UV Index
Humidity
Weather in Grafton today, September 16, 2026
Grafton starts September 16, 2026 under largely sunny skies, with bright spells setting the tone from the outset. Outdoor plans should enjoy long stretches of open sky as the day unfolds. Expect a grey start, with morning cloud around 100% by 08:00. Outdoor plans early on should not rely on bright skies.
The temperature range runs from about 10°C up to 25°C. The air stays humid, with relative humidity between 55% and 97% and the peak around 04:00. Airflow remains manageable, reaching about 4.1 km/h around 11:00.
Expect a more open afternoon, with limited cloud around 49% by 15:00. Residual damp risk should be lower than earlier. Visibility holds near 15.3 km, though it can fall to 12.3 km. Daylight runs from 06:34 to 18:47, lasting 12 hours 13 minutes of sunlight today.
In short, September 16, 2026 looks like a fine day in Grafton for being outside, peaking around 25°C.
Frequently asked questions about weather in Grafton
How warm does it get in Grafton?
The warmest month in Grafton is July, with average high temperatures of 28°C. The average temperature during this period is around 23°C.
How cold does it get in Grafton?
The coldest month in Grafton is January, with average low temperatures of -5°C. The average temperature during this period is around -1°C.
What is the wettest time of year in Grafton?
The wettest month in Grafton is December, with an average of 124mm of precipitation.
What is the driest time of year in Grafton?
The driest month in Grafton is November, with an average of 83mm of precipitation.
Explore more weather forecasts
- Millbury, Massachusetts
- New York City, New York
- Northbridge, Massachusetts
- Los Angeles, California
- Shrewsbury, Massachusetts
- Brooklyn, New York
- Worcester, Massachusetts
- Chicago, Illinois
- Auburn, Massachusetts
- Houston, Texas
- Uxbridge, Massachusetts
- Queens, New York
- Milford, Massachusetts
- Phoenix, Arizona
- Leicester, Massachusetts
- Philadelphia, Pennsylvania