Grantham Weather Forecast
- 52
- 72
Chance Rain
- 41
- 66
Rain
- 41
- 50
Chance Rain Showers
- 42
- 66
Partly Sunny
- 57
- 75
Chance Rain Showers
- 39
- 66
Slight Chance Rain Showers
- 43
- 62
Partly Sunny
Today 25 Apr Sullivan
Cloudy with isolated Showers. Highs around 70. Light and variable Winds. Chance of rain 20 percent.
Tonight 25 Apr Sullivan
Cloudy. A chance of rain this Evening, then rain likely after midnight. Lows in the mid 50s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.
Grantham Temperature Statistics
April Temperature
Lebanon Municipal Airport (12.4 miles)
Lowest 10 April, 2025
19.9 °FAverage April
45.2 °FHighest 19 April, 2025
78.7 °F
Climate (2020–Present)
Lebanon Municipal Airport (12.4 miles)
Average Low 2020–2025
38.1 °FAverage 2020–2025
48.7 °FAverage High 2020–2025
59.8 °F