Climate Chart of Trenton, USA

Climate overview

Temperature

The monthly mean temperature is lowest in January, at 0.5 °C, and highest in July, at 25.2 °C. These figures describe monthly averages rather than daytime maximum temperatures, so they provide a broad seasonal reference rather than a forecast of afternoon conditions. Across the calendar months, the unweighted mean of the monthly mean temperatures is 12.7 °C. This summarizes the monthly averages without weighting them by the number of days in each month.

Rain

Mean daily rainfall is lowest in January, at 2.06 mm/day, and highest in July, at 4.19 mm/day. The figures are daily means, not monthly totals; the lower average does not guarantee rain-free days or indicate how often rain occurs. The unweighted mean across the monthly mean daily rainfall values is 3.15 mm/day. Use this as a broad summary, while allowing for day-to-day conditions to differ from the monthly average.

Snow

Mean daily snowfall is highest in February, at 6.93 mm/day. The unweighted mean across the monthly mean daily snowfall values is 1.65 mm/day. These daily averages do not establish how many days bring snow, snow depth, or how long any snow cover lasts.

Sunshine

Mean daily sunshine reaches its highest monthly value in July, at 11.27 hours/day, and its lowest in December, at 5.25 hours/day. These are average hours of sunshine per day, not measures of daylight length, so they can help frame outdoor plans without guaranteeing the sunshine on a particular date. The unweighted mean across the monthly mean daily sunshine values is 8.20 hours/day. It offers a general reference for the calendar year rather than a promise of consistent conditions from day to day.