MONTHLY CLIMATOLOGICAL SUMMARY for May 2026 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 17.9 25.9 16:40 9.5 03:39 0.5 0.0 0.0 3.5 14.0 00:15 130 02 16.5 24.2 17:05 11.2 05:41 1.9 0.0 1.2 2.2 13.0 18:26 201 03 14.4 18.1 14:47 11.3 05:54 3.9 0.0 0.0 2.6 17.0 13:50 267 04 12.1 14.1 18:08 10.3 05:47 6.3 0.0 3.2 3.8 15.0 19:23 19 05 12.6 18.5 13:59 9.4 05:55 5.7 0.0 0.0 3.6 19.0 19:04 21 06 9.4 13.7 15:43 5.7 05:53 9.0 0.0 0.0 4.8 19.0 09:33 5 07 10.9 15.2 17:11 7.6 05:23 7.4 0.0 0.0 2.1 14.0 16:30 98 08 13.3 19.7 14:10 6.7 05:04 5.0 0.0 0.0 2.1 12.0 08:19 108 09 14.7 22.7 15:24 6.7 05:38 3.7 0.0 0.0 2.7 14.0 11:14 62 10 10.1 13.9 17:30 4.4 23:55 8.2 0.0 0.0 6.7 21.0 10:23 28 11 7.3 12.1 16:35 3.4 02:08 11.0 0.0 1.0 4.1 18.0 14:21 346 12 9.3 14.7 13:15 2.6 04:39 9.0 0.0 0.8 5.2 26.0 12:36 272 13 8.9 13.2 11:29 5.8 23:30 9.4 0.0 2.4 6.8 24.0 15:52 268 14 8.5 13.4 18:19 4.6 05:46 9.9 0.0 2.0 3.9 18.0 15:42 327 15 9.5 14.8 14:56 4.7 05:15 8.9 0.0 0.0 3.6 19.0 11:47 306 16 9.9 14.3 12:37 4.9 03:55 8.4 0.0 0.4 4.1 16.0 11:56 250 17 12.1 16.8 15:35 8.7 05:45 6.3 0.0 0.0 4.3 17.0 17:58 252 18 11.0 14.8 14:28 6.2 04:31 7.3 0.0 0.0 3.0 17.0 15:47 228 19 13.7 18.1 14:26 10.1 03:48 4.7 0.0 1.4 3.9 20.0 19:41 180 20 15.2 20.1 14:48 12.1 04:11 3.1 0.0 0.0 7.3 30.0 16:33 245 21 17.3 23.8 19:19 10.4 02:41 1.0 0.0 0.0 2.3 17.0 10:04 216 22 21.7 30.1 16:42 13.1 04:39 0.0 3.3 0.0 2.4 18.0 10:48 176 23 22.7 28.8 16:20 17.7 23:59 0.0 4.3 0.0 2.6 19.0 04:11 278 24 22.8 32.3 17:24 14.4 06:12 0.0 4.5 0.0 1.6 12.0 18:10 154 25 25.7 34.2 15:34 17.5 05:14 0.0 7.4 0.0 2.7 14.0 16:07 125 26 26.7 35.7 16:52 17.7 05:32 0.0 8.4 0.0 2.2 14.0 21:31 170 27 20.2 26.4 15:45 14.1 23:58 0.0 1.9 2.2 4.5 19.0 13:47 66 28 21.5 28.9 14:29 12.8 02:52 0.0 3.2 0.0 3.8 18.0 11:17 105 29 20.5 25.2 18:27 16.1 05:50 0.0 2.2 0.0 3.8 17.0 13:57 263 30 21.8 30.3 16:59 13.8 05:50 0.0 3.5 0.0 1.7 12.0 18:27 157 31 18.8 22.6 13:59 14.7 05:04 0.0 0.5 0.0 6.0 19.0 16:29 262 --------------------------------------------------------------------------------------- 15.4 35.7 26 2.6 12 130.6 39.1 14.6 3.7 30.0 20 278