Grafton Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
30.5 30.0 28.2 25.8 23.2 20.8 20.8 22.7 25.5 27.3 28.8 29.8 26.0
Mean Min (°C)
19.8 19.5 18.2 15.0 11.1 8.7 7.5 8.0 11.2 14.0 16.5 18.3 13.9
Mean Rain (mm)
146.8 127.0 128.0 85.6 73.5 71.4 40.0 37.6 39.6 68.5 86.9 110.7 1007.8
Median Rain (mm)
141.1 68.2 93.5 74.9 39.1 51.2 19.6 19.6 21.9 43.5 73.5 77.8 933.8
Mean Rain Days
12.6 11.9 15.0 10.7 10.3 9.7 7.8 6.1 6.5 8.6 9.4 12.1 121.6

Grafton Daily Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max (°C)
44.6 46.3 39.4 33.7 30.4 30.4 27.6 36.2 38.6 41.0 42.9 42.5 46.3
Low Max (°C)
20.4 20.6 20.0 17.7 15.6 14.0 13.2 14.6 15.6 14.3 18.3 18.2 13.2
High Min (°C)
28.6 24.6 23.0 20.7 20.2 16.3 17.7 17.8 19.0 20.7 22.8 23.7 28.6
Low Min (°C)
13.4 8.4 10.1 5.0 1.1 -0.8 -1.9 -0.2 3.2 4.6 6.2 9.5 -1.9
High Rain (mm)
126.5 252.0 103.4 113.8 226.1 128.4 137.2 99.8 109.0 91.0 131.1 132.0 252.0

Grafton Monthly Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Mn. Max (°C)
33.5 33.3 31.6 27.9 26.6 22.2 22.6 25.1 28.7 29.9 31.9 32.8 27.8
Low Mn. Max (°C)
27.7 27.5 26.2 24.2 21.5 19.3 19.3 21.2 23.3 23.8 25.6 25.7 24.5
High Mn. Min (°C)
21.7 20.8 19.4 16.2 14.9 10.9 9.0 9.9 12.9 16.4 18.4 19.6 14.5
Low Mn. Min (°C)
18.2 17.4 16.4 13.2 9.1 6.3 5.7 5.7 10.0 12.3 14.6 16.4 13.2
High Rain (mm)
308.4 502.4 394.8 257.0 516.9 219.6 270.1 189.2 166.1 239.8 292.5 512.8 1740.9
Low Rain (mm)
7.0 0.0 16.2 8.8 0.0 0.0 1.6 0.0 0.0 0.0 0.0 6.0 300.8

Grafton Annual Temperatures & Rainfall

Grafton annual climate

Grafton Average Number of Days With Temperatures

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
≥ 40°C
0.3 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.3 0.5 1.2
≥ 35°C
3.0 2.2 0.8 0.0 0.0 0.0 0.0 0.0 0.5 1.3 2.4 3.1 12.6
≥ 30°C
17.1 13.5 7.7 1.1 0.1 0.0 0.0 0.6 3.7 7.7 10.7 13.5 73.4
≤ 2°C
0.0 0.0 0.0 0.0 0.1 0.6 1.2 0.6 0.0 0.0 0.0 0.0 2.5
≤ 0°C
0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.4

Grafton 'per Week' Values (14th/86th Percentiles)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max
34.1 32.5 30.1 28.0 25.3 23.1 23.1 25.7 29.7 32.2 32.8 34.1 31.1
Low Max
26.7 26.4 25.2 23.4 21.0 18.2 18.4 19.5 21.8 22.6 24.5 26.0 20.8
High Min
22.0 21.5 19.3 17.3 14.0 12.5 11.0 11.4 14.7 17.1 19.3 20.8 19.5
Low Min
17.2 17.9 15.6 12.2 7.0 4.8 3.9 4.3 8.1 10.7 13.6 15.7 7.3

Grafton Data Availability

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Years of Minima
20 22 20 19 19 20 20 20 21 22 20 21 20.0
Earliest Entry
2003 2003 2003 2003 2003 2003 2003 2003 2002 2002 2002 2002 2002
Latest Entry
2024 2024 2024 2023 2023 2023 2023 2023 2023 2023 2023 2023 2024
Years of Maxima
20 22 21 20 20 21 21 20 22 22 21 22 21.0
Earliest Entry
2003 2003 2003 2003 2003 2003 2003 2003 2002 2002 2002 2002 2002
Latest Entry
2024 2024 2024 2023 2023 2023 2023 2023 2023 2023 2023 2023 2024
Years of Rainfall
33 35 32 33 35 35 33 33 35 34 31 29 32.0
Earliest Entry
1918 1918 1917 1917 1917 1917 1917 1917 1917 1918 1917 1917 1917
Latest Entry
2024 2024 2024 2023 2023 2023 2023 2023 2023 2023 2023 2023 2024

Station Details

GRAFTON RESEARCH STN
Northern Rivers, New South Wales/ACT
29.6224°S 152.9605°E 25m AMSL
Commenced 1917

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Winter is Coming: Chilly day for Sydney, rain pelts eastern seaboard

17:22 AEST Just as we forecast yesterday, a coastal trough has deepened along the NSW and southeast Qld coasts as a low in the Coral Sea continues to inch closer to Qld.  The trough has brought some interesting weather to NSW in the past 36 hours or so, particularly along the coastal fringe, giving those New South Welshmen a “Stark” Game of Thrones reminder: winter is coming.

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