Greatstone
Temperature (°C) (Maximum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 13.1 14.7 10.3 - - - - - - - - - 12.70
2020 12.4 13.4 12.7 20.6 24.8 25.2 30.4 29.8 25.9 17.7 16.9 13.1 20.24
2019 11.9 16.7 15.3 20.1 20.7 25.3 32.1 26.4 22.7 18.3 15.4 13.3 19.85
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: 12.3 13.6 14.7 20.1 22.0 24.5 28.0 26.5 22.7 19.4 16.1 12.9 18.62
Temperature (°C) (Minimum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 -3.9 -2.9 -3.1 - - - - - - - - - -3.31
2020 -1.2 -0.6 -0.4 0.1 2.0 4.7 7.6 9.9 7.6 3.4 0.6 -0.8 2.74
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: -2.9 -1.6 -1.3 0.7 2.2 7.0 9.0 8.3 6.3 3.1 -1.3 -1.5 1.83
Temperature (°C) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 4.3 6.0 4.4 - - - - - - - - - 4.91
2020 7.3 7.6 7.5 10.3 12.7 15.5 16.9 19.2 15.9 12.1 10.7 6.8 11.87
2019 4.5 7.1 8.6 9.6 11.9 15.6 18.0 17.9 15.5 12.4 8.4 7.5 11.41
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 4.4 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 7.2 7.5 10.86
2015 5.0 4.2 6.5 8.5 11.3 14.1 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 - - - - - - - 16.8 14.5 13.1 7.1 7.1 11.71
Av: 5.4 5.7 7.0 9.5 12.4 15.3 17.5 17.4 15.3 12.7 8.9 7.4 10.63
Frost Days
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Tot.
2021 11 8 3 - - - - - - - - - 22
2020 3 2 1 0 0 0 0 0 0 0 0 5 11
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 5 2 0 0 0 0 0 0 0 2 5 18
Windchill (°C) (Maximum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 13.0 13.8 10.1 - - - - - - - - - 12.28
2020 11.2 12.4 12.6 20.6 24.8 25.2 30.4 29.8 25.9 17.7 16.1 12.1 19.89
2019 10.8 16.7 15.3 20.1 20.7 25.3 32.1 26.4 22.7 18.0 14.9 11.6 19.54
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: 11.1 13.0 14.3 20.0 22.0 24.5 28.0 26.5 22.7 19.4 15.6 11.8 18.29
Windchill (°C) (Minimum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 -6.8 -9.3 -4.0 - - - - - - - - - -6.69
2020 -1.2 -2.4 -2.0 -1.5 2.0 4.7 7.6 9.9 6.8 3.4 0.2 -5.1 1.88
2019 -5.4 -5.3 -1.0 -0.9 -0.1 8.1 8.8 8.4 5.8 2.3 -1.2 -3.6 1.33
2018 -2.6 -11.1 -12.3 0.4 0.3 6.5 11.6 6.0 3.6 0.5 -1.5 -2.8 -0.11
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: -4.2 -5.2 -3.5 -0.8 1.3 6.4 8.9 8.1 4.1 2.6 -2.3 -11.8 -0.25
Windchill (°C) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 2.4 3.4 2.8 - - - - - - - - - 2.83
2020 5.9 5.4 5.5 9.8 12.3 15.5 16.8 19.2 15.8 11.3 9.7 5.1 11.02
2019 3.0 5.8 7.0 8.3 11.2 15.2 17.9 17.9 15.2 11.6 7.2 6.1 10.54
2018 4.7 0.6 3.4 9.1 12.7 15.1 19.2 17.6 14.9 11.9 8.3 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 2.1 4.5 6.9 10.1 13.5 16.2 16.9 13.0 11.1 9.2 9.1 9.63
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 5.8 5.3 10.84
Av: 3.8 3.6 5.3 8.4 11.7 14.9 17.4 17.3 14.8 12.0 7.7 5.8 9.55
Heat Index(°C) (Maximum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 13.1 14.7 10.3 - - - - - - - - - 12.70
2020 12.4 13.4 12.7 20.6 24.8 25.2 32.1 32.4 25.9 17.7 16.9 13.1 20.59
2019 11.9 16.7 15.3 20.1 20.7 25.3 36.9 26.4 22.7 18.3 15.4 13.3 20.25
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: 12.3 13.6 14.7 20.1 22.0 24.5 29.4 27.0 22.7 19.4 16.1 12.9 18.74
Heat Index(°C) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 4.3 6.0 4.4 - - - - - - - - - 4.91
2020 7.3 7.6 7.5 10.3 12.7 15.5 16.9 19.2 15.9 12.1 10.7 6.8 11.87
2019 4.5 7.1 8.6 9.6 11.9 15.6 18.1 17.9 15.5 12.4 8.4 7.5 11.41
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 4.4 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 7.2 7.5 10.86
2015 5.0 4.2 6.5 8.5 11.3 14.1 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 - - - - - - - 16.8 14.5 13.1 7.1 7.1 11.71
Av: 5.4 5.7 7.0 9.5 12.4 15.3 17.5 17.4 15.3 12.7 8.9 7.4 10.63
Wind Speed (Knots) (Maximum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 42.6 33.0 19.1 - - - - - - - - - 31.57
2020 40.8 44.3 34.8 29.5 33.9 28.7 28.7 33.0 29.5 48.7 37.4 40.0 35.77
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: 38.3 37.3 32.8 27.7 32.5 29.4 31.8 31.6 30.3 36.0 39.3 37.9 34.05
Wind Speed (Knots) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 5.5 7.6 4.5 - - - - - - - - - 5.86
2020 5.2 8.2 7.1 2.8 2.7 1.6 1.3 1.1 1.4 5.6 5.5 5.9 4.03
2019 4.0 4.7 6.2 5.6 4.4 5.1 4.4 4.8 5.0 5.5 4.7 5.3 4.98
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 3.75
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 5.5 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 6.4 5.5 5.0 4.9 4.7 4.4 4.1 4.3 5.2 5.5 5.7 5.18
Wind Direction (Degrees) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 213 162 83 - - - - - - - - - 152.9
2020 216 229 155 106 136 170 218 189 190 220 198 230 188.0
2019 256 199 211 125 170 168 190 200 202 203 196 221 195.0
2018 209 163 162 167 148 132 151 220 209 196 164 218 178.2
2017 165 132 252 208 156 193 206 207 221 230 257 252 206.4
2016 191 194 195 180 172 189 191 175 181 163 200 172 183.7
2015 215 199 192 151 176 174 176 172 177 192 202 173 183.2
2014 179 179 178 156 170 170 197 202 136 183 153 227 177.4
2013 - - - - - - - 207 171 181 238 189 197.3
Av: 206 182 178 156 161 171 190 196 186 196 201 210 184.7
Wind Run(NM's)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Tot.
2021 5,274.2 6,647.6 1,056.4 - - - - - - - - - 12,978.2
2020 5,061.1 7,456.7 6,858.7 2,634.3 2,567.2 1,474.8 1,222.7 1,094.3 1,345.2 5,464.0 5,131.2 5,700.5 46,010.6
2019 3,886.3 4,052.4 6,066.5 5,201.3 4,336.3 4,829.1 4,318.2 4,626.3 4,719.6 5,286.7 4,391.0 5,158.3 56,872.0
2018 6,538.3 6,670.8 6,686.5 4,985.1 4,239.3 5,229.4 4,285.4 3,928.0 4,121.5 4,067.0 6,552.7 5,036.4 62,340.6
2017 350.8 302.8 131.4 3,805.3 5,358.6 5,013.4 5,288.0 4,362.5 4,086.5 5,014.4 3,808.9 5,525.5 43,048.0
2016 6,463.3 6,392.6 6,753.0 4,851.0 5,373.4 4,464.4 4,427.7 4,989.7 3,457.6 4,446.1 5,293.8 1,787.4 58,700.1
2015 6,127.6 5,225.2 6,389.0 6,177.6 6,186.2 5,583.3 5,423.5 4,769.7 5,395.6 4,596.4 6,117.1 8,629.2 70,620.4
2014 7,909.3 8,439.5 5,248.3 5,035.7 5,227.8 4,372.7 4,695.0 4,728.0 4,209.4 5,477.5 5,722.4 5,712.7 66,778.2
2013 - - - - - - - 644.1 4,629.7 6,124.1 4,519.2 6,745.9 22,663.0
Av: 5,201.4 5,648.4 4,898.7 4,670.0 4,755.5 4,423.9 4,237.2 3,642.8 3,995.6 5,059.5 5,192.0 5,537.0 48,890.1
Pressure (mb) (Maximum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 1,033.3 1,043.6 1,036.3 - - - - - - - - - 1,037.74
2020 1,050.9 1,040.0 1,039.3 1,032.6 1,038.0 1,029.2 1,031.3 1,023.8 1,030.4 1,028.0 1,041.8 1,032.7 1,034.83
2019 1,045.0 1,039.3 1,038.9 1,031.8 1,042.3 1,031.7 1,029.3 1,030.3 1,037.7 1,027.7 1,024.6 1,040.1 1,034.89
2018 1,034.4 1,032.5 1,034.5 1,031.6 1,029.0 1,033.1 1,028.5 1,026.9 1,041.5 1,039.4 1,031.6 1,039.0 1,033.51
2017 1,039.1 1,031.3 1,033.9 1,039.3 1,029.2 1,029.6 1,025.7 1,026.7 1,025.9 1,036.6 1,031.7 1,039.4 1,032.38
2016 1,032.7 1,036.7 1,034.5 1,030.8 1,029.5 1,025.0 1,027.1 1,028.7 1,026.2 1,036.0 1,035.7 1,045.7 1,032.38
2015 1,037.4 1,041.9 1,040.6 1,038.0 1,027.7 1,033.0 1,026.1 1,024.3 1,037.3 1,032.0 1,029.5 1,036.3 1,033.67
2014 1,025.3 1,017.8 1,033.0 1,030.9 1,036.7 1,029.0 1,023.8 1,022.0 1,027.7 1,029.5 1,027.4 1,041.8 1,028.75
2013 - - - - - - - 1,028.2 1,031.0 1,027.1 1,039.0 1,034.6 1,031.97
Av: 1,037.3 1,035.4 1,036.4 1,033.6 1,033.2 1,030.1 1,027.4 1,026.4 1,032.2 1,032.0 1,032.7 1,038.7 1,033.35
Pressure (mb) (Minimum)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 979.0 991.0 1,024.0 - - - - - - - - - 998.00
2020 991.6 983.1 986.5 995.9 999.5 996.5 1,006.9 1,001.0 995.1 980.3 997.1 971.0 992.03
2019 985.6 984.0 988.3 995.0 994.7 998.4 1,006.3 1,003.5 996.1 1,000.0 981.6 972.8 992.19
2018 990.5 999.4 986.0 996.8 1,007.1 1,013.8 1,007.1 1,006.9 1,001.0 991.9 996.1 998.5 999.60
2017 987.8 984.6 989.1 1,000.4 995.4 992.1 1,003.8 1,009.0 994.9 1,002.8 991.4 973.2 993.72
2016 980.1 981.4 981.8 995.3 999.9 996.1 1,007.8 1,006.7 1,007.3 1,004.1 973.1 1,017.4 995.90
2015 975.7 990.8 995.1 1,005.7 989.7 1,004.6 998.1 994.4 984.8 996.5 1,000.0 1,006.8 995.19
2014 986.1 978.4 981.8 998.7 998.9 1,003.0 1,001.3 995.3 1,008.0 994.3 988.9 992.9 993.97
2013 - - - - - - - 1,017.0 994.0 983.8 990.8 979.1 992.95
Av: 984.6 986.6 991.6 998.3 997.9 1,000.6 1,004.5 1,004.2 997.6 994.2 989.9 989.0 994.84
Pressure (mb) (Average)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Av.
2021 1,012.9 1,017.5 1,030.4 - - - - - - - - - 1,020.28
2020 1,022.6 1,013.8 1,018.7 1,019.1 1,023.5 1,015.0 1,018.9 1,014.6 1,018.5 1,010.6 1,022.1 1,005.5 1,016.91
2019 1,019.8 1,022.6 1,019.0 1,015.9 1,019.0 1,016.9 1,018.3 1,017.1 1,019.9 1,013.5 1,003.3 1,011.9 1,016.42
2018 1,013.3 1,018.7 1,004.0 1,012.8 1,019.3 1,021.3 1,018.9 1,019.1 1,023.2 1,019.8 1,014.7 1,019.6 1,017.07
2017 1,023.3 1,014.3 1,015.2 1,023.8 1,018.3 1,015.7 1,016.2 1,018.4 1,015.7 1,020.8 1,018.1 1,015.5 1,017.95
2016 1,009.5 1,010.6 1,014.4 1,012.7 1,014.3 1,014.5 1,017.5 1,018.6 1,017.5 1,022.1 1,014.2 1,028.1 1,016.16
2015 1,015.0 1,016.6 1,020.8 1,021.7 1,015.4 1,020.0 1,014.8 1,014.7 1,017.1 1,017.8 1,016.5 1,020.4 1,017.56
2014 1,003.2 1,000.6 1,016.2 1,014.8 1,015.3 1,019.1 1,015.2 1,011.9 1,019.1 1,013.4 1,007.4 1,019.2 1,012.94
2013 - - - - - - - 1,021.6 1,015.8 1,011.9 1,017.2 1,016.4 1,016.60
Av: 1,015.0 1,014.3 1,017.3 1,017.3 1,017.9 1,017.5 1,017.1 1,017.0 1,018.4 1,016.2 1,014.2 1,017.1 1,016.88
Precipitation (in) (Total)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Tot.
2021 4.03 1.69 0.13 - - - - - - - - - 5.84
2020 1.28 3.58 2.65 2.01 0.67 1.79 1.57 1.70 1.10 5.30 1.62 4.20 27.46
2019 1.14 2.83 2.19 1.04 1.26 4.13 2.65 1.11 1.83 4.25 5.07 3.75 31.26
2018 1.02 1.93 0.56 0.27 0.63 0.67 0.14 1.38 0.87 1.19 6.22 4.36 19.24
2017 2.29 0.06 0.13 0.06 3.02 0.00 0.00 0.03 3.69 0.09 0.00 1.91 11.26
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 32.28
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 2.59 2.07 1.00 1.87 2.02 0.95 2.21 5.17 0.07 3.32 3.43 0.87 25.58
2013 - - - - - - - 0.02 0.87 3.59 2.69 2.57 9.72
Av: 2.27 2.31 1.17 0.97 1.60 1.52 1.38 1.90 1.76 3.02 3.78 2.42 20.80
Rain Days (>0.04 in)
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Annual Tot.
2021 19 8 2 - - - - - - - - - 29
2020 10 17 9 5 1 6 7 9 2 18 11 15 110
2019 9 8 11 3 5 8 4 7 8 15 19 14 111
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: 11 9 5 4 6 5 4 6 6 9 13 9 75
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