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 20.7 20.7 22.8 25.5 27.2 28.8 29.9 26.0
Mean Min (°C)
19.8 19.5 18.2 15.0 11.1 8.7 7.5 8.2 11.2 14.0 16.6 18.4 13.9
Mean Rain (mm)
145.9 124.9 127.0 88.0 73.6 70.2 39.7 40.1 40.5 69.0 89.1 110.2 1012.2
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 12.0 15.0 10.9 10.4 9.6 7.9 6.2 6.5 8.8 9.4 12.0 122.2

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 13.9 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 11.3 12.9 16.4 18.5 19.6 15.0
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 0.4 1.2
≥ 35°C
3.0 2.1 0.8 0.0 0.0 0.0 0.0 0.1 0.5 1.3 2.4 3.1 12.5
≥ 30°C
17.1 13.5 7.7 1.2 0.1 0.0 0.0 0.7 3.7 7.7 10.5 13.8 74.3
≤ 2°C
0.0 0.0 0.0 0.0 0.1 0.6 1.1 0.6 0.0 0.0 0.0 0.0 2.4
≤ 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
21 23 21 20 20 21 21 21 22 23 21 22 21.0
Earliest Entry
2003 2003 2003 2003 2003 2003 2003 2003 2002 2002 2002 2002 2002
Latest Entry
2025 2025 2025 2024 2024 2024 2024 2024 2024 2024 2024 2024 2025
Years of Maxima
21 23 22 21 21 22 22 21 23 23 22 23 22.0
Earliest Entry
2003 2003 2003 2003 2003 2003 2003 2003 2002 2002 2002 2002 2002
Latest Entry
2025 2025 2025 2024 2024 2024 2024 2024 2024 2024 2024 2024 2025
Years of Rainfall
34 36 33 34 36 36 34 34 36 35 32 30 33.0
Earliest Entry
1918 1918 1917 1917 1917 1917 1917 1917 1917 1918 1917 1917 1917
Latest Entry
2025 2025 2025 2024 2024 2024 2024 2024 2024 2024 2024 2024 2025

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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