WXSIM: Chelmer Village
Updated: Saturday, 18.10.2025 17:00 UTC
 
Tonight

Mostly Cloudy
Mostly Cloudy
Sunday

Rain likely
Rain likely
Sunday
night
Chance rain
Chance rain
Monday

Rain likely
Rain likely
Monday
night
Chance rain
Chance rain
Tuesday

Chance rain
Chance rain
Tuesday
night
Mostly Cloudy
Mostly Cloudy
Wednesday

Mostly Cloudy
Mostly Cloudy
Wednesday
night
Rain likely
Rain likely
<5 mm. <5 mm. 7 mm. 2 mm. <2 mm. 7 mm.
Low: 11° High: 14° Low: 11° High: 14° Low: 12° High: 14° Low: 10° High: 13° Low: 12°



























 

WU Forecast: Chelmsford

Tonight
Cloudy
Cloudy
Tomorrow
Rain
Rain
Tomorrow night
Rain
Rain
Monday
Rain
Rain
Monday night
Showers Early
Showers Early
Tuesday
Partly Cloudy
Partly Cloudy
Tuesday night
Partly Cloudy
Partly Cloudy
Wednesday
PM Light Rain
PM Light Rain
Wednesday night
Light Rain
Light Rain
11°C15°C12°C15°C11°C15°C9°C15°C12°C

WXSIM Forecast Accuracy

Actual Observed (Act), WxSim Generated (WS) , Weather Underground (WU)

Morning Forecast

Updated: 10-18-25 at 9:20 am
Goal Forecast Day Day +1 Day +2 Day +3
± 2.0° C High Low High Low High Low High Low
Date WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS
10-18-25 15   15 12   12 15   15 13   12 15   14 12   10 15   14 9   10
10-17-25 15 14.3 16 10 10.4 9 15   16 12   10 16   14 13   12 15   15 11   11
10-16-25 16 15.9 15 9 11.8 8 15 14.3 16 9 10.4 10 15   15 11   11 15   14 12   11
10-15-25 13 13.7 16 10 8.9 11 15 15.9 16 9 11.8 8 14 14.3 16 8 10.4 10 15   16 11   9
10-14-25 14 12.8 15 10 10.6 13 14 13.7 17 10 8.9 12 15 15.9 17 9 11.8 6 14 14.3 16 9 10.4 8
10-13-25 16 15.9 17 12 10.7 14 15 12.8 16 10 10.6 12 14 13.7 17 10 8.9 9 15 15.9 16 9 11.8 9
10-12-25 17 15.1 17 12 12.8 11 17 15.9 17 12 10.7 11 16 12.8 17 10 10.6 12 15 13.7 17 10 8.9 9
10-11-25 16 13.7 19 8 4.9 8 16 15.1 19 12 12.8 10 17 15.9 16 12 10.7 11 16 12.8 17 11 10.6 11
10-10-25 17 16 21 10 10.5 10 17 13.7 19 8 4.9 9 17 15.1 19 12 12.8 11 17 15.9 18 12 10.7 11
10-09-25 18 14.7 18 12 13.6 10 17 16 20 10 10.5 10 17 13.7 19 8 4.9 9 17 15.1 19 11 12.8 11
10-08-25 17 17.8 18 7 8 9 18 14.7 19 11 13.6 10 17 16 20 10 10.5 9 17 13.7 19 8 4.9 9
10-07-25 18 16.3 20 10 13 12 17 17.8 17 7 8 8 19 14.7 18 10 13.6 8 18 16 19 9 10.5 11
10-06-25 20 20.9 21 11 11.7 12 18 16.3 20 10 13 10 18 17.8 17 7 8 7 18 14.7 18 10 13.6 9
10-05-25 17 15.9 16 10 10.4 11 20 20.9 20 11 11.7 11 18 16.3 19 10 13 10 17 17.8 18 7 8 7
Results WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS WU Act WS
# Succ 11 7 10 7 9 5 8 6 8 4 6 7 7 3 7 6
% Succ 84.6   53.8 76.9   53.8 75.0   41.7 66.7   50.0 72.7   36.4 54.5   63.6 70.0   30.0 70.0   60.0
Ave Error 1.2   2.1 1.3   1.9 1.4   2.7 1.6   2.0 1.7   2.8 1.8   2.3 1.8   2.7 1.8   1.8
Net Error 0.8   2.0 -0.5   0.1 1.0   2.4 -0.7   -0.5 1.4   2.6 -0.8   -1.2 1.4   2.7 -0.6   -0.7
Std Dev 0.9   1.7 1.0   1.2 1.1   1.9 1.0   1.6 1.3   2.0 1.3   2.0 1.4   2.0 1.3   1.5