Greatstone
Temperature (°C) (Maximum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 11.9 16.7 15.3 20.1 20.7 25.3 32.1 26.4 22.7 18.3 15.4 11.7 19.71
2018 12.7 11.1 12.9 24.8 25.2 24.2 30.1 30.3 22.6 23.1 16.0 13.9 20.57
2017 11.4 18.9 20.7 19.8 23.8 25.9 26.4 25.7 20.2 21.4 15.4 13.2 20.25
2016 12.1 12.6 12.7 14.1 20.6 23.3 24.1 29.2 24.9 17.1 15.8 11.9 18.20
2015 12.2 10.0 13.8 22.2 19.1 23.3 25.9 24.7 18.3 18.0 16.9 14.2 18.22
2014 12.6 11.3 18.9 18.7 19.7 24.1 26.7 23.8 22.3 20.3 17.0 12.3 18.98
2013 - - - - - - - 22.3 24.8 19.6 15.0 11.2 18.60
Av: 12.1 13.4 15.7 20.0 21.5 24.3 27.6 26.1 22.3 19.7 15.9 12.6 19.22
Temperature (°C) (Minimum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 -4.2 -1.5 -0.2 0.8 2.4 8.1 8.8 8.4 5.8 2.3 -1.2 -3.6 2.16
2018 -1.1 -3.9 -3.9 3.3 2.1 6.5 11.6 7.6 3.9 1.6 -0.2 -0.8 2.21
2017 -4.6 0.6 0.0 -0.4 3.8 8.9 8.8 7.3 5.8 2.8 -1.2 -2.1 2.48
2016 -4.2 -3.0 -1.8 0.1 1.1 8.6 9.0 8.1 9.4 4.4 -4.1 -2.8 2.06
2015 -2.6 -3.2 -0.2 -0.8 2.8 5.8 7.8 8.3 6.1 3.9 -2.2 2.6 2.36
2014 -1.1 1.6 -0.6 2.1 1.1 6.6 9.6 5.9 6.0 3.7 0.8 -3.1 2.72
2013 - - - - - - - 11.2 5.6 2.9 -2.9 -1.4 3.07
Av: -3.0 -1.6 -1.1 0.8 2.2 7.4 9.3 8.1 6.1 3.1 -1.6 -1.6 2.44
Temperature (°C) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 4.5 7.1 8.6 9.6 11.9 15.6 18.0 17.9 15.5 12.4 8.4 6.5 11.33
2018 6.7 3.6 5.8 10.3 13.2 15.5 19.2 17.7 15.0 12.5 9.8 8.0 11.44
2017 2.8 4.5 8.9 9.6 13.4 16.9 17.8 17.0 14.6 13.5 7.6 5.7 11.02
2016 6.1 5.6 6.1 7.7 12.2 14.5 16.8 17.5 17.0 12.1 7.1 7.5 10.86
2015 5.0 4.3 6.5 8.6 11.3 14.2 16.4 17.0 13.6 11.7 10.4 10.9 10.81
2014 6.9 7.1 7.9 10.3 12.2 15.0 17.6 16.1 16.3 14.0 10.3 5.5 11.60
2013 - - - - - - - 16.7 14.5 13.1 7.1 7.1 11.70
Av: 5.3 5.4 7.3 9.4 12.4 15.2 17.6 17.1 15.2 12.8 8.7 7.3 11.25
Frost Days
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Tot.
2019 11 1 1 0 0 0 0 0 0 0 1 5 19
2018 4 9 5 0 0 0 0 0 0 0 1 2 21
2017 11 0 2 2 0 0 0 0 0 0 5 9 29
2016 4 6 3 0 0 0 0 0 0 0 5 2 20
2015 8 10 1 1 0 0 0 0 0 0 2 0 22
2014 2 0 2 0 0 0 0 0 0 0 0 12 16
2013 - - - - - - - 0 0 0 2 3 5
Av: 7 4 2 1 0 0 0 0 0 0 2 5 19
Windchill (°C) (Maximum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 10.8 16.7 15.3 20.1 20.7 25.3 32.1 26.4 22.7 18.0 14.9 10.4 19.45
2018 11.0 9.9 12.8 24.8 25.2 24.2 30.1 30.3 22.6 23.1 15.8 12.9 20.22
2017 11.4 18.9 20.7 19.8 23.8 25.9 26.4 25.7 20.2 21.4 15.4 11.8 20.13
2016 11.2 12.2 12.7 14.0 20.6 23.3 24.1 29.2 24.9 17.1 15.8 11.3 18.04
2015 10.2 10.0 11.6 22.2 19.1 23.3 25.9 24.7 18.3 17.8 15.9 12.9 17.66
2014 10.1 9.9 18.9 18.7 19.7 24.1 26.7 23.8 22.3 20.3 17.0 11.9 18.61
2013 - - - - - - - 22.3 24.8 19.6 14.2 10.2 18.23
Av: 10.8 12.9 15.3 19.9 21.5 24.3 27.6 26.1 22.3 19.6 15.6 11.6 18.91
Windchill (°C) (Minimum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 -5.4 -4.8 -1.0 -0.9 -0.1 8.1 8.8 8.4 5.8 2.3 -1.2 -3.6 1.37
2018 -2.6 -11.3 -12.3 0.4 0.3 6.5 11.6 6.0 3.6 0.5 -1.5 -2.8 -0.13
2017 -4.6 0.0 0.0 -2.2 2.8 6.9 8.8 7.3 5.3 1.8 -4.1 -5.8 1.35
2016 -4.7 -3.7 -4.9 -1.5 1.0 7.3 9.0 8.1 0.0 4.1 -4.1 -70.3 -4.98
2015 -5.4 -6.0 -1.5 -1.5 2.0 5.3 7.8 8.3 5.6 3.2 -4.6 1.5 1.22
2014 -2.9 -3.5 -2.1 1.3 1.1 6.0 8.9 5.9 0.0 3.0 0.3 -6.3 0.97
2013 - - - - - - - 11.2 5.4 2.6 -3.2 -2.2 2.77
Av: -4.3 -4.9 -3.7 -0.7 1.2 6.7 9.1 7.9 3.7 2.5 -2.6 -12.8 0.37
Windchill (°C) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 3.0 5.8 7.0 8.3 11.2 15.2 17.9 17.9 15.2 11.6 7.2 4.9 10.44
2018 4.7 0.6 3.4 9.1 12.7 15.1 19.2 17.6 14.9 11.9 8.2 6.6 10.34
2017 2.7 4.0 8.9 8.8 12.6 16.7 17.7 17.0 14.4 13.0 6.6 3.8 10.51
2016 4.1 3.4 4.0 6.4 11.4 14.0 16.6 17.3 16.2 11.6 5.7 6.1 9.74
2015 2.9 2.2 4.5 6.9 10.1 13.6 16.2 16.8 13.0 11.1 9.2 9.1 9.64
2014 4.7 4.4 6.4 9.2 11.4 14.6 17.5 15.9 15.1 13.4 9.1 3.8 10.46
2013 - - - - - - - 16.7 14.1 12.3 5.7 5.3 10.83
Av: 3.7 3.4 5.7 8.1 11.6 14.9 17.5 17.0 14.7 12.1 7.4 5.7 10.28
Heat Index(°C) (Maximum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 11.9 16.7 15.3 20.1 20.7 25.3 36.9 26.4 22.7 18.3 15.4 11.7 20.12
2018 12.7 11.1 12.9 24.8 25.2 24.2 32.1 30.4 22.6 23.1 16.0 13.9 20.74
2017 11.4 18.9 20.7 19.8 23.8 25.9 26.4 25.7 20.2 21.4 15.4 13.2 20.25
2016 12.1 12.6 12.7 14.1 20.6 23.3 24.1 29.9 24.9 17.1 15.8 11.9 18.26
2015 12.2 10.0 13.8 22.2 19.1 23.3 25.9 24.7 18.3 18.0 16.9 14.2 18.22
2014 12.6 11.3 18.9 18.7 19.7 24.1 28.0 23.8 22.3 20.3 17.0 12.3 19.09
2013 - - - - - - - 22.3 24.8 19.6 15.0 11.2 18.60
Av: 12.1 13.4 15.7 20.0 21.5 24.3 28.9 26.2 22.3 19.7 15.9 12.6 19.32
Heat Index(°C) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 4.4 7.1 8.6 9.6 11.9 15.6 18.1 17.9 15.5 12.4 8.4 6.5 11.33
2018 6.7 3.6 5.8 10.3 13.2 15.5 19.2 17.7 15.0 12.5 9.8 8.0 11.44
2017 2.8 4.5 8.9 9.6 13.4 16.9 17.8 17.0 14.6 13.5 7.6 5.7 11.02
2016 6.1 5.6 6.1 7.7 12.2 14.5 16.8 17.5 17.0 12.2 7.1 7.5 10.86
2015 5.0 4.3 6.5 8.6 11.3 14.2 16.4 17.0 13.6 11.7 10.4 10.9 10.81
2014 6.9 7.1 7.9 10.3 12.2 15.0 17.6 16.1 16.3 14.0 10.3 5.5 11.60
2013 - - - - - - - 16.7 14.5 13.1 7.1 7.1 11.70
Av: 5.3 5.4 7.3 9.4 12.4 15.2 17.6 17.1 15.2 12.7 8.7 7.3 11.25
Wind Speed (Knots) (Maximum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 28.7 45.2 43.5 27.8 31.3 35.6 30.4 37.4 31.3 29.5 43.5 37.4 35.12
2018 48.7 34.8 35.6 28.7 28.7 22.6 31.3 33.0 30.4 31.3 33.9 29.5 32.37
2017 20.0 17.4 15.6 23.5 28.7 33.9 27.8 33.9 33.9 33.0 38.2 41.7 28.97
2016 40.0 43.5 46.9 32.2 27.8 26.9 28.7 33.0 26.9 30.4 51.3 25.2 34.40
2015 46.1 36.5 35.6 27.8 40.0 33.9 30.4 27.8 33.0 26.9 39.1 36.5 34.47
2014 40.0 43.5 31.3 24.3 37.4 24.3 45.2 33.9 22.6 36.5 33.9 40.8 34.47
2013 - - - - - - - 20.9 34.8 51.3 37.4 52.1 39.28
Av: 37.2 36.8 34.8 27.4 32.3 29.5 32.3 31.4 30.4 34.1 39.6 37.6 34.15
Wind Speed (Knots) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 4.0 4.7 6.2 5.6 4.4 5.1 4.4 4.8 5.0 5.4 4.7 6.0 5.03
2018 6.7 7.7 6.9 5.3 4.4 5.6 4.4 4.0 4.4 4.2 7.0 5.2 5.48
2017 0.4 0.3 0.1 4.1 5.5 5.4 5.5 4.5 4.4 5.1 4.0 5.8 3.76
2016 6.7 7.1 6.9 5.2 5.5 4.8 4.6 5.2 3.7 4.6 5.6 1.9 5.14
2015 6.4 5.9 6.6 6.6 6.4 5.9 5.6 4.9 5.8 4.7 6.5 8.9 6.18
2014 8.2 9.6 5.4 5.4 5.4 4.7 4.9 4.9 4.5 5.6 6.1 5.9 5.89
2013 - - - - - - - 3.6 5.0 6.3 4.8 7.0 5.35
Av: 5.4 5.9 5.4 5.4 5.3 5.2 4.9 4.6 4.7 5.2 5.5 5.8 5.26
Wind Direction (Degrees) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 256 199 211 125 170 168 189 200 202 203 196 236 196.2
2018 209 163 162 167 148 132 152 220 209 195 164 218 178.2
2017 165 133 252 208 155 193 206 207 220 230 257 252 206.4
2016 191 194 195 180 172 189 191 175 181 164 201 172 183.7
2015 215 199 192 151 176 174 177 173 176 192 202 173 183.2
2014 179 179 177 157 170 170 197 202 136 183 153 226 177.4
2013 - - - - - - - 208 171 181 238 189 197.5
Av: 203 178 198 164 165 171 185 198 185 193 201 209 188.9
Wind Run(NM's)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Tot.
2019 3902.3 4037.1 6072.9 5195.1 4331.4 4829.5 4321.6 4624.1 4731.7 5275.5 4403.4 2615.7 54340.5
2018 6531.1 6687.4 6669.2 4981.9 4239.5 5229.0 4283.6 3933.8 4118.2 4071.6 6545.1 5041.2 62331.8
2017 350.8 303.6 134.6 3808.3 5355.0 5011.4 5288.7 4362.8 4093.4 5007.0 3818.1 5528.4 43062.1
2016 6463.3 6392.6 6753.0 4851.0 5373.4 4464.4 4427.7 4987.9 3457.4 4446.1 5293.8 1787.4 58698.0
2015 6129.5 5235.2 6380.5 6169.2 6183.7 5593.0 5417.7 4769.3 5407.3 4596.4 6117.1 8629.2 70628.2
2014 7923.4 8423.9 5239.9 5035.9 5227.3 4382.3 4686.4 4727.6 4207.5 5485.2 5725.1 5711.3 66775.9
2013 - - - - - - - 645.1 4639.1 6124.5 4511.2 6754.4 22674.4
Av: 5216.8 5180.0 5208.4 5006.9 5118.4 4918.3 4737.6 4007.2 4379.2 5000.9 5202.0 5152.5 54073.0
Pressure (mb) (Maximum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 1045.0 1039.3 1038.9 1031.8 1042.3 1031.7 1029.3 1030.3 1037.7 1027.7 1024.6 1033.3 1034.32
2018 1034.4 1032.5 1034.5 1031.6 1029.0 1033.1 1028.5 1026.9 1041.5 1039.4 1031.6 1039.0 1033.51
2017 1039.1 1031.3 1033.9 1039.3 1029.2 1029.6 1025.7 1026.7 1025.9 1036.6 1031.7 1039.4 1032.38
2016 1032.7 1036.7 1034.5 1030.8 1029.5 1025.0 1027.1 1028.7 1026.2 1036.0 1035.7 1045.7 1032.38
2015 1037.4 1041.9 1040.6 1038.0 1027.7 1033.0 1026.1 1024.3 1037.3 1032.0 1029.5 1036.3 1033.67
2014 1025.3 1017.8 1033.0 1030.9 1036.7 1029.0 1023.8 1022.0 1027.7 1029.5 1027.4 1041.8 1028.75
2013 - - - - - - - 1028.4 1031.0 1027.1 1039.0 1034.6 1032.00
Av: 1035.6 1033.3 1035.9 1033.7 1032.4 1030.2 1026.7 1026.8 1032.5 1032.6 1031.3 1038.6 1032.43
Pressure (mb) (Minimum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 985.2 984.0 988.3 995.0 994.7 998.4 1006.3 1003.5 996.1 1000.0 981.6 972.8 992.15
2018 990.5 999.4 986.0 996.8 1007.1 1013.8 1007.1 1006.9 1001.0 991.9 996.1 998.5 999.60
2017 987.8 984.6 989.1 1000.4 995.4 992.1 1003.8 1009.0 994.9 1002.8 991.4 973.2 993.72
2016 980.1 981.4 981.8 995.3 999.9 996.1 1007.8 1006.7 1007.3 1004.1 973.1 1017.4 995.90
2015 975.7 991.3 995.1 1005.7 989.7 1004.6 998.1 994.4 984.8 996.5 1000.0 1006.8 995.23
2014 986.1 978.4 981.8 998.7 998.9 1003.0 1001.3 995.3 1008.0 994.3 988.9 992.9 993.97
2013 - - - - - - - 1017.0 994.0 983.8 990.8 979.1 992.95
Av: 984.2 986.5 987.0 998.7 997.6 1001.3 1004.1 1004.7 998.0 996.2 988.9 991.5 994.79
Pressure (mb) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2019 1019.8 1022.6 1019.0 1015.9 1019.0 1016.8 1018.3 1017.1 1019.9 1013.5 1003.3 1011.5 1016.39
2018 1013.3 1018.7 1003.9 1012.8 1019.3 1021.3 1018.9 1019.1 1023.2 1019.7 1014.7 1019.7 1017.07
2017 1023.3 1014.3 1015.2 1023.8 1018.3 1015.7 1016.2 1018.4 1015.7 1020.8 1018.1 1015.5 1017.95
2016 1009.5 1010.6 1014.4 1012.7 1014.3 1014.5 1017.5 1018.6 1017.5 1022.1 1014.2 1028.1 1016.16
2015 1014.9 1016.6 1020.8 1021.7 1015.4 1020.0 1014.8 1014.7 1017.1 1017.8 1016.5 1020.4 1017.56
2014 1003.2 1000.6 1016.2 1014.8 1015.3 1019.1 1015.2 1011.9 1019.2 1013.4 1007.4 1019.2 1012.95
2013 - - - - - - - 1021.7 1015.8 1011.9 1017.2 1016.4 1016.60
Av: 1014.0 1013.9 1014.9 1017.0 1016.9 1017.9 1016.8 1017.4 1018.3 1017.0 1013.1 1018.7 1016.38
Precipitation (in) (Total)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Tot.
2019 1.17 2.80 2.19 1.04 1.26 4.13 2.65 1.11 1.90 4.17 5.07 1.15 28.65
2018 1.01 1.93 0.56 0.27 0.63 0.67 0.14 1.38 0.87 1.19 6.19 4.36 19.19
2017 2.29 0.06 0.13 0.08 3.01 0.00 0.00 0.04 3.68 0.09 0.00 1.91 11.28
2016 3.13 4.50 2.46 1.38 1.92 2.37 0.88 1.60 1.89 5.07 6.87 0.21 32.29
2015 2.68 1.81 0.24 0.17 1.67 0.70 2.22 4.17 3.73 1.31 4.35 1.46 24.52
2014 2.57 2.09 0.98 1.87 2.02 0.95 2.21 5.17 0.07 3.32 3.43 0.87 25.57
2013 - - - - - - - 0.02 0.87 3.59 2.69 2.57 9.72
Av: 2.14 2.20 1.09 0.80 1.75 1.47 1.35 1.93 1.86 2.68 4.09 1.79 21.60
Rain Days (>0.04 in)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Tot.
2019 9 8 11 3 5 8 4 7 8 15 19 5 102
2018 10 11 3 2 5 3 1 1 3 4 15 13 71
2017 6 0 2 0 7 0 0 0 9 0 0 6 30
2016 12 9 7 9 7 9 1 5 5 9 14 2 89
2015 10 9 2 1 8 3 6 13 11 8 16 9 96
2014 14 12 4 6 11 5 8 15 0 10 12 5 102
2013 - - - - - - - 0 6 11 13 11 41
Av: 10 8 5 4 7 5 3 6 6 8 13 7 76
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