Weather observations for the past three days for
Graham, Graham Municipal Airport
Metric (Imperial)
Date Time (cdt) Wind (kph) Vis. (km) Weather Sky Cond. Temperature (ºC) Relative Humidity Wind Chill (°C) Heat Index (°C) Pressure Precipitation (cm)
Air Dwpt 6 hour altimeter (cm) sea level (mb) 1 hr 3 hr 6 hr
Max. Min.
14 22:15 Vrbl 9 16.09 Fair CLR 27.9 23.8 78% 32 76.07 0.0
14 21:55 E 7 16.09 Fair CLR 27.7 23.3 77% 31 76.02 0.0
14 21:35 SE 7 16.09 Fair CLR 28.3 23.1 73% 32 76 0.0
14 21:15 SE 7 14.48 Fair CLR 28.5 23.2 73% 32 75.97 0.0
14 20:55 SE 7 14.48 Fair CLR 29.8 23 67% 34 75.97 0.0
14 20:35 Vrbl 6 14.48 Fair CLR 30.2 23.1 66% 35 75.97 0.0
14 20:15 Vrbl 11 16.09 Fair CLR 31 23.1 63% 36 75.97 0.0
14 19:55 SE 7 16.09 Fair CLR 31.7 23.8 63% 37 75.97 0.0
14 19:35 Vrbl 7 16.09 Fair CLR 32.3 23.3 59% 37 75.97 0.0
14 19:15 Vrbl 7 16.09 Fair CLR 32.8 22.8 56% 38 75.97 0.0
14 18:55 S 15 16.09 A Few Clouds FEW050 33.1 22.7 34.3 31.8 54% 38 75.95 0.0
14 18:35 SE 17 16.09 Partly Cloudy SCT050 33.6 22.8 53% 39 75.95 0.0
14 18:15 S 15 16.09 A Few Clouds FEW055 33.7 22.3 51% 38 75.95 0.0
14 17:55 S 15 16.09 Fair CLR 33.8 21.8 49% 38 75.95 0.0
14 17:35 Vrbl 9 16.09 Fair CLR 33.9 22.5 51% 39 75.95 0.0
14 17:15 S 19 G 30 16.09 A Few Clouds FEW055 33.9 22.2 50% 38 75.97 0.0
14 16:55 SE 20 G 26 16.09 Fair CLR 34 22.6 51% 39 75.97 0.0
14 16:35 SE 15 G 28 16.09 Fair CLR 33.9 22.8 52% 39 75.97 0.0
14 16:15 S 19 16.09 A Few Clouds FEW050 34.1 22.8 52% 39 75.97 0.0
14 15:55 Vrbl 11 16.09 Partly Cloudy SCT050 34.3 23.3 53% 40 75.97 0.0
14 15:35 Vrbl 11 16.09 A Few Clouds FEW048 33.8 22.6 52% 39 76 0.0
14 15:15 SE 17 16.09 Mostly Cloudy BKN046 33.7 23.2 54% 39 76.02 0.0
14 14:55 S 15 16.09 A Few Clouds FEW045 33.7 23.6 56% 40 76.02 0.0
14 14:35 Vrbl 11 16.09 Partly Cloudy FEW040 SCT380 33.5 23.6 56% 39 76.02 0.0
14 14:15 Vrbl 9 16.09 Partly Cloudy SCT040 SCT340 32.5 24 61% 39 76.05 0.0
14 13:55 Vrbl 11 16.09 Partly Cloudy FEW038 SCT320 32.6 23.8 60% 38 76.05 0.0
14 13:35 Vrbl 9 16.09 Partly Cloudy SCT038 SCT290 SCT320 32.1 24 62% 38 76.07 0.0
14 13:15 Vrbl 7 16.09 Partly Cloudy SCT036 SCT300 SCT380 32.2 24.6 64% 39 76.1 0.0
14 12:55 SW 9 16.09 Partly Cloudy SCT034 31.8 24.3 31.9 24.1 65% 38 76.12 0.0
14 12:35 S 13 16.09 Partly Cloudy SCT031 31.6 24.2 65% 38 76.12 0.0
14 12:15 S 13 16.09 Mostly Cloudy BKN029 31.3 24.4 67% 37 76.12 0.0
14 11:55 Vrbl 11 16.09 Mostly Cloudy BKN028 BKN034 30.7 24.5 70% 37 76.15 0.0
14 11:35 Vrbl 11 16.09 Overcast BKN026 OVC033 29.9 24.4 72% 35 76.15 0.0
14 11:15 SW 15 16.09 Mostly Cloudy BKN026 29.9 24.3 72% 35 76.12 0.0
14 10:55 SW 15 16.09 Overcast OVC025 29.5 24.4 74% 35 76.12 0.0
14 10:35 SW 17 16.09 Mostly Cloudy BKN024 29.5 24.6 75% 35 76.12 0.0
14 10:15 S 17 16.09 Overcast BKN019 OVC024 28.4 24.4 79% 33 76.12 0.0
14 09:55 S 13 16.09 Mostly Cloudy BKN017 28.2 24.5 80% 33 76.12 0.0
14 09:35 S 13 16.09 Mostly Cloudy BKN014 28 24.4 81% 32 76.1 0.0
14 09:15 S 13 16.09 Mostly Cloudy BKN014 27 24.3 85% 30 76.12 0.0
14 08:55 S 17 16.09 A Few Clouds FEW015 26.6 24.1 86% 29 76.1 0.0
14 08:35 S 13 16.09 A Few Clouds FEW016 26.2 24.1 88% 28 76.1 0.0
14 08:15 S 11 16.09 Fair CLR 26 24 89% 28 76.05 0.0
14 07:55 S 13 14.48 Fair CLR 25.2 23.7 91% 26 76.05 0.0
14 07:35 Vrbl 9 14.48 Fair CLR 24.6 23.4 93% 25 76.05 0.0
14 07:15 Vrbl 11 12.87 Fair CLR 24.4 23.3 94% 24 76.02 0.0
14 06:55 Vrbl 7 12.87 Fair CLR 24.1 23.1 26.2 24 94% 23 76 0.0
14 06:35 Vrbl 7 14.48 Fair CLR 24.1 23.1 94% 23 75.97 0.0
14 06:15 Vrbl 11 14.48 Fair CLR 24 22.9 94% 23 75.95 0.0
14 05:55 Vrbl 9 16.09 Fair CLR 24.5 22.9 91% 25 75.92 0.0
14 05:35 SE 9 16.09 Fair CLR 24.8 22.9 89% 25 75.9 0.0
14 05:15 Vrbl 9 16.09 Fair CLR 24.8 22.9 89% 25 75.9 0.0
14 04:55 Vrbl 11 14.48 Fair CLR 24.2 23 93% 24 75.92 0.0
14 04:35 SE 7 14.48 Fair CLR 24 22.8 93% 23 75.92 0.0
14 04:15 SE 6 14.48 Fair CLR 24.2 22.8 92% 24 75.95 0.0
14 03:55 Calm 16.09 Fair CLR 24.7 23 90% 25 75.95 0.0
14 03:35 Vrbl 6 16.09 Fair CLR 24.9 23 89% 25 75.9 0.0
14 03:15 S 7 14.48 Fair CLR 25.1 22.9 88% 26 75.92 0.0
14 02:55 S 7 14.48 Fair CLR 25.2 22.9 87% 26 75.95 0.0
14 02:35 Vrbl 6 14.48 Fair CLR 25.4 22.9 86% 27 75.95 0.0
14 02:15 S 7 14.48 Fair CLR 25.4 22.9 86% 27 75.95 0.0
14 01:55 Vrbl 6 16.09 Fair CLR 25.1 23 88% 26 75.95 0.0
14 01:35 SE 7 16.09 Fair CLR 25.2 22.9 87% 26 75.95 0.0
14 01:15 SE 7 16.09 Fair CLR 25.6 22.9 85% 27 76 0.0
14 00:55 SE 7 16.09 Fair CLR 26.4 22.9 32.2 26.4 81% 29 76 0.0
14 00:35 Vrbl 9 16.09 Fair CLR 26.6 23 81% 29 75.97 0.0
14 00:15 Vrbl 9 14.48 Fair CLR 26.5 23 81% 29 75.95 0.0
13 23:55 SE 7 16.09 Fair CLR 26.5 23.2 82% 29 75.95 0.0
13 23:40 SE 11 16.09 Fair CLR 26.6 23.2 82% 29 75.95 0.0
13 23:15 SE 9 16.09 Fair CLR 26.9 23.1 80% 29 75.95 0.0
13 22:55 SE 13 16.09 Fair CLR 26.9 23.1 80% 29 75.9 0.0
13 22:35 SE 11 16.09 Fair CLR 27 22.9 78% 30 75.87 0.0
13 22:15 SE 9 16.09 Fair CLR 26.8 22.9 79% 29 75.87 0.0
13 21:55 SE 7 16.09 Fair CLR 27.5 22.9 76% 30 75.82 0.0
13 21:35 SE 9 16.09 Fair CLR 27.7 23 76% 31 75.79 0.0
13 21:15 SE 7 14.48 Fair CLR 27.9 23 75% 31 75.79 0.0
13 20:55 SE 7 16.09 Fair CLR 28.5 23.1 73% 32 75.79 0.0
13 20:35 SE 9 16.09 Fair CLR 29.2 23 69% 33 75.79 0.0
13 20:15 SE 11 16.09 Fair CLR 29.9 22.9 66% 34 75.82 0.0
13 19:55 SE 9 16.09 Fair CLR 31 22.1 59% 35 75.79 0.0
13 19:35 SE 9 16.09 Fair CLR 31.2 22.8 61% 36 75.79 0.0
13 19:15 SE 15 16.09 Fair CLR 31.8 22.3 57% 36 75.79 0.0
13 18:55 SE 17 16.09 Fair CLR 32.4 22.2 33.3 29.4 55% 36 75.79 0.0
13 18:35 SE 15 16.09 Fair CLR 32.9 21 50% 36 75.77 0.0
13 18:15 SE 13 16.09 Fair CLR 33 21 49% 36 75.77 0.0
13 17:55 Vrbl 9 16.09 Fair CLR 33.3 22.2 52% 38 75.79 0.0
13 17:35 SE 13 16.09 Fair CLR 33 22 52% 37 75.79 0.0
13 17:15 Vrbl 9 16.09 Fair CLR 33 22.7 55% 38 75.82 0.0
13 16:55 SE 15 16.09 A Few Clouds FEW290 32.7 22.5 55% 37 75.82 0.0
13 16:35 S 13 16.09 Fair CLR 32.9 22.9 56% 38 75.82 0.0
13 16:15 S 15 16.09 Fair CLR 32.7 23.2 57% 38 75.82 0.0
13 15:55 Vrbl 9 16.09 A Few Clouds FEW320 31.9 23.2 60% 37 75.82 0.0
13 15:35 SE 17 16.09 A Few Clouds FEW300 31.8 23.5 61% 37 75.84 0.0
13 15:15 SE 15 16.09 A Few Clouds FEW310 31.5 23.5 63% 37 75.84 0.0
13 14:55 Vrbl 9 16.09 Partly Cloudy FEW280 SCT360 30.8 23.2 64% 35 75.87 0.0
13 14:35 SE 13 16.09 Partly Cloudy FEW270 SCT340 SCT370 30.5 23.1 65% 35 75.9 0.0
13 14:15 S 13 16.09 Partly Cloudy FEW270 SCT300 SCT330 SCT370 30.4 23.2 65% 35 75.9 0.0
13 13:55 Vrbl 9 16.09 Partly Cloudy SCT290 SCT370 29.9 23.1 67% 34 75.92 0.0
13 13:35 Vrbl 11 16.09 Partly Cloudy FEW260 SCT330 SCT360 30 23 66% 34 75.95 0.0
13 13:15 Vrbl 9 16.09 A Few Clouds FEW330 29.8 23.1 67% 34 75.95 0.0
13 12:55 Vrbl 11 16.09 A Few Clouds FEW300 29.7 22.6 29.9 20.9 66% 33 75.97 0.0
13 12:35 Vrbl 9 16.09 Fair CLR 29.4 22.4 66% 33 76 0.0
13 12:15 Vrbl 9 16.09 Fair CLR 29 22.6 68% 32 76.02 0.0
13 11:55 Vrbl 11 16.09 A Few Clouds FEW370 28.2 22.2 70% 31 76.02 0.0
13 11:35 Vrbl 7 16.09 Fair CLR 28.1 22.3 71% 31 76.02 0.0
13 11:15 Vrbl 9 16.09 A Few Clouds FEW120 27.5 22 72% 30 76 0.0
13 10:55 SE 9 16.09 Partly Cloudy SCT110 26.5 21.7 75% 28 76 0.0
13 10:35 Vrbl 9 16.09 Mostly Cloudy BKN110 26.2 21.5 75% 28 76 0.0
13 10:15 Vrbl 11 16.09 A Few Clouds FEW120 26.5 21.4 74% 28 76 0.0
13 09:55 Vrbl 6 16.09 Fair CLR 25.6 21.2 77% 27 75.95 0.0
13 09:35 Vrbl 9 16.09 Fair CLR 25.6 21.2 77% 27 75.95 0.0
13 09:15 Vrbl 11 16.09 Fair CLR 24.8 21.2 80% 26 75.92 0.0
13 08:55 Vrbl 7 16.09 Fair CLR 23.8 21 84% 75.95 0.0
13 08:35 SE 9 16.09 Fair CLR 23.2 21.1 88% 75.95 0.0
13 08:15 Vrbl 9 16.09 Fair CLR 22.5 21 91% 75.95 0.0
13 07:55 SE 9 16.09 Fair CLR 22 20.9 94% 75.92 0.0
13 07:35 SE 7 16.09 Fair CLR 21.6 20.9 96% 75.92 0.0
13 07:20 SE 9 16.09 Fair CLR 21.3 20.8 97% 75.9 0.0
13 06:55 SE 9 16.09 Fair CLR 20.7 20.4 22.6 20.2 98% 75.9 0.0 0.03
13 06:35 SE 9 14.48 Fair CLR 20.5 20.2 98% 75.9 0.0
13 06:15 E 6 16.09 Fair CLR 20.3 20 98% 75.9 0.0
13 05:55 E 6 16.09 Fair CLR 20.7 20.3 98% 75.87 0.0
13 05:35 E 6 16.09 Fair CLR 20.8 20.3 97% 75.87 0.0
13 05:15 E 6 16.09 Fair CLR 21 20.5 97% 75.87 0.0
13 04:55 E 7 16.09 Fair CLR 21 20.5 97% 75.87 0.0
13 04:35 E 6 16.09 Fair CLR 21 20.5 97% 75.84 0.0
13 04:15 SE 6 16.09 Fair CLR 21 20.3 96% 75.84 0.0
13 03:55 Calm 16.09 Fair CLR 21.6 20.5 94% 75.84 0.0 0.03
13 03:35 Calm 16.09 Fair CLR 21.8 20.8 94% 75.84 0.0
13 03:15 Vrbl 6 16.09 Fair CLR 22 20.8 93% 75.84 0.0
13 02:55 Vrbl 6 16.09 Fair CLR 21.9 20.9 94% 75.82 0.0 0.03
13 02:35 SE 6 16.09 Fair CLR 22 20.8 93% 75.84 0.0 0.03
13 02:15 Vrbl 7 16.09 Fair CLR 22.2 20.8 92% 75.82 0.0
13 01:55 Vrbl 7 16.09 Fair CLR 22.3 20.8 91% 75.84 0.0
13 01:35 Vrbl 11 16.09 Fair CLR 22.4 20.7 90% 75.84 0.0
13 01:15 SE 7 16.09 Fair CLR 22.6 20.6 89% 75.84 0.0
13 00:55 SE 11 16.09 Fair CLR 22.7 20.6 28.9 22.3 88% 75.84 0.0
13 00:35 Vrbl 9 14.48 Fair CLR 22.9 20.6 87% 75.84 0.0
13 00:15 SE 13 14.48 Fair CLR 22.9 20.7 87% 75.84 0.0
12 23:55 SE 9 14.48 Fair CLR 22.8 20.7 88% 75.84 0.0
12 23:35 Vrbl 6 16.09 Fair CLR 22.7 20.7 89% 75.87 0.0
12 23:15 SE 6 4.83 Fog/Mist CLR 22.6 20.8 90% 75.87 0.0
12 22:55 Calm 4.83 Fog/Mist CLR 22.7 20.8 89% 75.87 0.0
12 22:35 Calm 4.83 Fog/Mist CLR 23 20.9 88% 75.87 0.0
12 22:15 Calm 4.02 Fair with Haze CLR 23.2 20.9 87% 75.84 0.0
12 21:55 Calm 14.48 Fair CLR 23.6 20.9 85% 75.82 0.0
12 21:35 SE 6 16.09 Fair CLR 23.9 20.9 83% 24 75.79 0.0
12 21:15 SE 6 14.48 Fair CLR 24.5 20.9 80% 25 75.79 0.0
12 20:55 SE 7 16.09 Fair CLR 25.3 21 77% 26 75.77 0.0
12 20:35 SE 7 16.09 Fair CLR 26 21.1 74% 27 75.77 0.0
12 20:15 SE 7 14.48 Fair CLR 26.8 21 71% 29 75.74 0.0
12 19:55 Vrbl 6 16.09 Fair CLR 27.8 21 67% 30 75.74 0.0
12 19:35 S 11 16.09 Fair CLR 28.2 20.7 64% 30 75.74 0.0
12 19:15 SE 9 16.09 Fair CLR 28.6 20.8 63% 31 75.74 0.0
12 18:55 Calm 16.09 Fair CLR 28.4 20.3 29.7 26.9 62% 30 75.72 0.0
12 18:35 Vrbl 11 16.09 Fair CLR 29.4 19.5 55% 31 75.72 0.0
12 18:15 Vrbl 6 16.09 A Few Clouds FEW049 29.4 19.9 57% 31 75.74 0.0
12 17:55 SE 9 16.09 Mostly Cloudy BKN047 28.7 20.2 60% 31 75.77 0.0
12 17:35 Vrbl 9 16.09 Mostly Cloudy BKN047 29.6 19.8 56% 31 75.77 0.0
12 17:15 Calm 16.09 A Few Clouds FEW044 29.4 19.2 54% 31 75.77 0.0
12 16:55 SW 6 16.09 Fair CLR 28.4 19.6 59% 30 75.79 0.0
12 16:35 Vrbl 6 16.09 Fair CLR 29.2 19.5 56% 31 75.82 0.0
12 16:15 Vrbl 6 16.09 Fair CLR 29.4 20 57% 31 75.82 0.0
12 15:55 Vrbl 7 16.09 Mostly Cloudy BKN043 BKN060 28.8 20 59% 31 75.84 0.0
12 15:35 Vrbl 6 16.09 Mostly Cloudy FEW037 BKN046 BKN060 28.7 20.7 62% 31 75.84 0.0
12 15:15 Vrbl 7 16.09 Mostly Cloudy BKN039 BKN048 28 20.5 64% 30 75.87 0.0
12 14:55 Calm 16.09 A Few Clouds FEW048 28.4 20.4 62% 30 75.9 0.0
12 14:35 Vrbl 7 16.09 Partly Cloudy SCT048 SCT330 28.7 20.2 60% 31 75.9 0.0
12 14:15 SE 7 16.09 Partly Cloudy FEW047 SCT330 27.9 20.2 63% 30 75.9 0.0
12 13:55 Vrbl 11 16.09 Partly Cloudy FEW032 SCT039 28 20.6 64% 30 75.92 0.0
12 13:35 Vrbl 9 16.09 Partly Cloudy SCT033 SCT380 27.9 20.9 66% 30 75.95 0.0
12 13:15 Calm 16.09 Mostly Cloudy SCT031 SCT320 SCT360 BKN380 27.5 20.4 65% 29 75.95 0.0
12 12:55 E 6 16.09 A Few Clouds FEW027 26.7 20.5 26.9 19.5 69% 28 75.97 0.0
12 12:35 Calm 16.09 Partly Cloudy SCT025 26.7 20.6 69% 28 75.97 0.0
12 12:15 E 11 16.09 Mostly Cloudy BKN024 25.4 20.3 73% 27 76 0.0
12 11:55 Calm 16.09 A Few Clouds FEW023 25.4 20.6 75% 27 76 0.0
12 11:35 Calm 16.09 A Few Clouds FEW350 25.2 20.6 76% 26 76 0.0
12 11:15 Calm 16.09 A Few Clouds FEW017 24.7 20.1 76% 26 76 0.0
12 10:55 E 6 16.09 Mostly Cloudy BKN016 BKN032 24 20.3 80% 24 76.02 0.0
12 10:35 Vrbl 6 16.09 Partly Cloudy SCT012 23.8 20.7 83% 76.02 0.0
12 10:15 NE 7 16.09 Partly Cloudy SCT010 23.3 20.6 85% 76.02 0.0
12 09:55 Calm 12.87 Mostly Cloudy BKN008 21.9 20.5 92% 76.05 0.0
12 09:35 Calm 9.66 Light Rain Fog/Mist BKN008 OVC013 21.6 20.4 93% 76.05 0.0
12 09:15 Calm 11.27 Light Rain OVC006 21.3 20.4 95% 76.05 0.0
12 08:55 E 6 16.09 Mostly Cloudy BKN005 20.8 20.2 96% 76 0.0
12 08:35 Calm 16.09 A Few Clouds FEW006 20.6 20.3 98% 76 0.0
12 08:15 E 6 14.48 Partly Cloudy SCT004 20 19.8 99% 76 0.0
12 07:55 E 7 12.87 Mostly Cloudy BKN003 BKN046 19.9 19.7 99% 75.97 0.0
12 07:35 NE 6 9.66 Fog/Mist BKN002 OVC046 19.6 19.4 99% 75.97 0.0
12 07:15 Calm 6.44 Fog/Mist OVC002 19.5 19.4 99% 75.97 0.0
12 06:55 Calm 12.87 Overcast OVC003 19.5 19.3 21 19.4 99% 75.92 0.0
12 06:35 Calm 9.66 Fog/Mist OVC004 19.6 19.4 99% 75.92 0.0
12 06:15 Calm 16.09 Overcast OVC004 19.6 19.5 99% 75.92 0.0
12 05:55 SW 6 16.09 Overcast OVC005 19.7 19.5 99% 75.92 0.0
12 05:35 Calm 16.09 Overcast OVC005 19.6 19.5 99% 75.92 0.0
12 05:15 Calm 16.09 Mostly Cloudy BKN006 19.6 19.4 99% 75.95 0.0
12 04:55 Calm 16.09 Fair CLR 19.6 19.4 99% 75.95 0.0
12 04:35 Calm 16.09 Fair CLR 19.6 19.4 99% 75.92 0.0
12 04:15 Calm 16.09 Fair CLR 19.4 19.2 99% 75.92 0.0
12 03:55 Calm 16.09 Fair CLR 19.6 19.4 99% 75.9 0.0
12 03:35 Calm 16.09 Fair CLR 19.9 19.7 99% 75.92 0.0
12 03:15 Calm 16.09 Fair CLR 20 19.8 99% 75.95 0.0
12 02:55 Calm 16.09 Fair CLR 20.3 20.1 99% 76 0.0
12 02:35 Calm 16.09 A Few Clouds FEW007 20.4 20.2 99% 76 0.0
12 02:15 Calm 16.09 Mostly Cloudy BKN006 20.6 20.4 99% 76.02 0.0
12 01:55 Calm 16.09 Overcast OVC005 21 20.8 99% 76.02 0.0
12 01:35 Calm 16.09 Overcast BKN006 OVC011 20.9 20.8 99% 76.02 0.0
12 01:15 Calm 12.87 Mostly Cloudy BKN011 20.5 20.3 99% 76.02 0.0
12 00:55 Calm 14.48 Partly Cloudy SCT010 20.3 20 27.2 19.6 98% 76.05 0.0
12 00:35 Calm 14.48 Partly Cloudy SCT010 SCT220 20 19.7 98% 76.07 0.0
12 00:15 SE 6 16.09 Mostly Cloudy FEW170 BKN220 19.9 19.4 97% 76.1 0.0
11 23:55 Calm 16.09 Partly Cloudy SCT160 19.6 18.9 96% 76.1 0.0
11 23:35 Calm 16.09 A Few Clouds FEW160 19.7 19.1 96% 76.1 0.0
11 23:15 SE 6 16.09 Fair CLR 19.9 19.4 97% 76.1 0.0
11 22:55 E 9 16.09 A Few Clouds FEW170 20.1 19.6 97% 76.1 0.0
11 22:35 SE 7 16.09 Fair CLR 20 19.4 96% 76.1 0.0
Date Time (cdt) Wind (kph) Vis. (km) Weather Sky Cond. Air Dwpt Max. Min. Relative Humidity Wind Chill (°C) Heat Index (°C) altimeter (cm) sea level (mb) 1 hr 3 hr 6 hr
6 hour
Temperature (ºC) Pressure Precipitation (cm)