National Weather Service United States Department of Commerce

Prolonged Heavy Rain and Snowfall Event for the Northwest U.S.

A prolonged atmospheric river event will continue to bring moderate to heavy rain to northern and central California through the Pacific Northwest with mountain snow in the Cascades and northern Rockies today into next week. Read More >

Monthly Precipitation Totals



Monthly Precipitation Totals


Fig. 2 - Monthly total precipitation of 30-year (1971-2000) historical average during a year.

Station Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
HOLUALOA 70
3.21
3.70
3.45
4.36
3.34
4.30
4.78
3.35
3.81
4.53
2.53
2.14
HONAUNAU 27
3.61
2.67
3.71
3.73
4.17
5.73
5.91
5.17
6.07
4.53
2.91
2.58
KAINALIU 73.2
4.04
2.68
3.73
3.99
4.51
6.33
6.64
5.80
6.73
4.63
2.77
2.62
NAPOOPOO 28
2.41
2.07
2.21
2.71
2.74
3.32
3.82
3.23
4.40
3.31
1.96
2.08
OPIHIHALE 2 24.1
3.04
2.55
3.43
2.82
3.04
3.08
3.52
3.77
4.15
3.56
2.93
2.51
PUUHONUA-O-HONAUNAU 27.4
2.54
1.60
1.66
1.95
1.98
2.41
2.50
2.33
2.61
2.25
1.68
1.74


Table 1 - Monthly total precipitataion of 30-year (1971-2000) historical average during a year.

Both Fig. 2 and Table 1 provide the climatorical average of the monthly total precipitation at six stations. There are annual cycles at every station, with maximum precipitation taking place in the summer months.
 

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