MONTHLY CLIMATOLOGICAL SUMMARY for Sep 2025 NAME: Royston, Hertfordshire ELEV: 80 meters LAT: 52-03.15 N LONG: 000-01.35 W TEMPERATURE (C), RAIN (mm), WIND SPEED (mph) HEAT COOL AVG MEAN DEG DEG WIND DOM DAY TEMP HIGH TIME LOW TIME DAYS DAYS RAIN SPEED HIGH TIME DIR --------------------------------------------------------------------------------------- 01 15.6 20.7 12:19 13.3 01:21 2.8 0.0 2.8 2.9 18.0 12:39 187 02 15.8 19.7 15:10 11.3 06:35 2.6 0.0 0.2 2.2 16.0 16:19 141 03 17.3 21.1 12:30 14.8 23:57 1.0 0.0 23.6 4.0 28.0 15:04 206 04 15.5 19.1 14:28 12.7 05:58 2.9 0.0 0.6 3.7 24.0 16:27 220 05 16.5 22.0 16:20 12.2 06:24 1.9 0.0 0.0 3.7 13.0 00:44 242 06 17.5 23.8 14:10 12.6 06:10 0.8 0.0 0.0 3.4 21.0 15:55 103 07 20.2 26.1 14:15 15.5 06:31 0.0 1.9 0.0 4.5 20.0 11:42 122 08 16.8 21.8 14:55 12.8 06:42 1.5 0.0 0.0 2.9 16.0 14:17 231 09 15.1 21.8 14:25 10.1 06:42 3.2 0.0 0.6 1.3 12.0 16:42 150 10 15.7 19.9 15:11 13.4 03:34 2.7 0.0 2.2 3.4 19.0 10:03 133 11 13.6 18.1 13:28 11.3 06:16 4.7 0.0 4.8 5.0 32.0 13:43 224 12 13.0 17.4 13:16 9.6 06:50 5.3 0.0 1.8 4.1 24.0 14:30 217 13 13.4 18.6 12:51 10.6 03:05 4.9 0.0 0.2 3.4 24.0 16:51 213 14 13.3 17.2 21:12 8.7 07:01 5.0 0.0 3.4 3.2 19.0 20:36 174 15 15.8 18.7 15:23 13.9 06:09 2.5 0.0 0.2 11.3 35.0 12:53 231 16 14.8 18.7 15:08 12.2 06:25 3.5 0.0 0.0 8.6 29.0 09:20 238 17 15.6 18.8 16:57 12.1 04:02 2.7 0.0 2.0 3.4 25.0 10:51 209 18 19.1 22.8 15:54 16.3 00:00 0.0 0.7 0.2 3.2 21.0 10:36 207 19 19.8 27.8 16:11 14.0 06:35 0.0 1.5 0.0 2.3 18.0 10:05 181 20 16.5 21.2 16:32 12.7 23:59 1.8 0.0 0.0 3.7 27.0 22:18 200 21 11.8 16.2 14:18 8.2 23:47 6.5 0.0 0.0 5.6 26.0 00:15 299 22 10.3 16.2 14:48 5.6 06:32 8.0 0.0 0.0 3.2 19.0 11:05 1 23 10.6 16.9 13:30 5.3 06:58 7.7 0.0 0.0 3.1 20.0 13:30 13 24 12.1 18.7 15:30 7.8 06:41 6.2 0.0 0.0 2.7 20.0 13:58 38 25 12.0 18.6 14:59 7.0 06:55 6.3 0.0 0.0 3.4 24.0 14:01 39 26 11.4 15.6 13:55 6.8 04:47 6.9 0.0 0.0 1.4 14.0 12:12 62 27 13.3 17.8 15:23 10.1 07:45 5.0 0.0 0.0 1.7 13.0 13:36 114 28 12.5 16.0 17:07 9.3 02:34 5.8 0.0 0.6 0.5 9.0 12:32 189 29 12.3 18.2 15:07 7.4 07:40 6.0 0.0 0.2 0.9 9.0 12:16 269 30 13.9 20.9 16:15 8.9 05:46 4.5 0.0 0.0 0.7 8.0 13:09 269 --------------------------------------------------------------------------------------- 14.7 27.8 19 5.3 23 112.8 4.1 43.4 3.4 35.0 15 212