A typical May from my records:

  • An average temperature of 9.7C.
    • Maximum temperature expected about 23C.
    • Minimum temperature expected about -1C.
    • Three air frosts - air temperature 0C or below.
    • One day fails to reach or exceed 10C.
    • Thirteen days are expected to reach or exceed 15C.
    • Three days are expected to reach or exceed 20C.
    • No days are expected to reach or exceed 25C though 2 days have in the past 10 years, 2021 and 2015
  • Wind run would be around 3230km with the windiest day expected to have a wind run of 300km.
    • Maximum wind gust would be in the region of 55km/h.
  • There would be rain on 12 days with the monthly total of around 60mm.

Rain totals for the month and year along with temperature and wind comparisons can be found here.

May Daily Observations
TemperatureWindRainfallBarometer
DateMinMaxMeanMean
(Km/h)
Gust
(Km/h)
Run (km)Prevailing Dir10 Minute Max (mm)Total (mm)Min (hPa)Max (hPa)Change (hPa)
1 8.3 24.8 15.4 2.4 29 54 East Nth East 0 0 1015.9 1023.5 -7.6
Warm in the afternoon with high cloud and light a light NE wind turning northerly for a while in the afternoon. Light shower in the evening.
2  9.4 23.2 15.4 1.2 13 26 South Sth West 0 0 1017.3 1024.9 +7.6
Cloudy morning with a few spots of rain. Cloud clearing by midday to a sunny and mild afternoon. Light breezes tending southerly.
3 7.4 20.5 12.2 1.7 17 38 East Nth East 0.2 0.2 1025.0 1030.2 +5.2
Some morning cloud, a sunny and mild afternoon with light breezes tending NE.
Taranaki remains sunniest place in NZ in 2022
4 10.4 16.8 12.7 3.1 22 71 East Nth East 0 0 1029.9 1032.4 -3.4
Fog and low cloud lifting after midday with a few brighter intervals but returning from mid afternoon. Light southerly winds turning NE from midday.
5 9.4 18.6 14.0 3.3 18 75 East Nth East 0 0 1025.3 1029.2 -3.9
Morning cloud clearing to a sunny and mild afternoon with a light NE wind.
Warmer winter set to follow wider NZ region's third-hottest summer
6 6.3 20.4 11.7 3.3 24 75 East Nth East 0 0 1027.5 1030.4 +2.9
Clear and sunny, mild in the afternoon. Fog rolling in later in afternoon with a NE wind.
7 10.6 19.4 13.8 4.7 20 106 East Nth East 0 0 1019.8 1029.2 -9.4
Sunny morning, high cloud increasing in the afternoon. Mostly light NE wind.
8 9.4 19.2 14.6 1.8 24 41 East Nth East 0.2 0.2 1012.6 1019.5 -6.9
Overcast with some rain around midday, light winds tending NE
9 11.2 17.6 13.6 5.7 29 129 South Sth West 0.6 4.6 1009.4 1020.0 +10.6
Overcast with early showers clearing by dawn but further showers in the afternoon. Southerly wind.
10 7.2 13.7 10.6 5.5 35 125 South Sth West 0.2 0.8 1020.3 1033.3 +13.0
Cloud increasing in the morning with a few showers. Cloud breaking by midday with sunny intervals. Cool southerly wind.
11 3.4 15.0 9.2 0.7 18 14 Variable 0 0 1032.2 1035.8 -3.6
Few clouds but mostly sunny with light variable breezes.
Explained: The far-off phenomenon tipped to dampen NZ's winter
12 0.7 16.5 7.8 1.1 15 23 East Nth East 0 0 1032.2 1036.3 -4.1
Morning frost, sunny and mild in the afternoon. Light NE wind.
13 4.0 15.2 9.1 3.0 26 68 East Nth East 0 0 1020.2 1032.1 -11.9
Few clouds, mostly sunny with a cool NE wind.
14 5.8 17.6 11.9 3.2 24 73 East Nth East 0.2 0.4 1009.3 1019.8 -10.5
Overcast with some morning showers, light NE wind.
15 9.1 12.1 10.3 3.0 21 68 East Nth East 0.2 3.6 1007.5 1013.3 -5.8
Overcast with low cloud and occasional rain and drizzle.
16 9.4 14.1 11.9 4.6 27 105 East Nth East 0.4 3.0 1006.2 1009.4 -3.2
Morning rain with low cloud. Some drizzle in the afternoon, NE wind.
Planes turned away from foggy Christchurch
17 8.2 16.0 11.7 5.4 30 123 East Nth East 0.2 0.2 1002.3 1009.6 +7.3
Any showers clearing before dawn. Sunny with a light NE wind turning southerly from early afternoon.
18 7.5 17.8 12.0 4.1 20 94 East Nth East 0 0 1003.7 1010.6 -6.9
Sunny and mild in the afternoon with light winds tending NE.
19 9.4 18.4 13.3 6.1 32 138 North Nth West 0.2 0.8 991.9 1003.3 -11.4
A period of rain clearing by midday with cloud breaking to a mild afternoon with northerly winds.
20 1.9 10.8 6.9 4.2 36 96 South Sth West 0.2 2.8 992.6 1005.5 +12.9
Cold southerly winds with showers.
Dumping down': First decent snowfall of the year hits southern mountains
In pictures: A trail of destruction left as storm batters the North Island
21 -0.8 16.4 7.0 2.5 20 57 West Nth West 0 0 997.5 1005.4 -7.9
Morning frost, sunny with light breezes tending NW.
22 1.2 14.7 8.0 4.0 33 91 East Nth East 0 0 999.9 1009.4 +9.5
Morning cloud breaking to a mostly sunny afternoon. A brief southerly change in the evening with a few spots of rain.
23 0.9 14.3 6.5 1.7 20 38 East Nth East 0 0 1009.8 1019.5 +9.7
Clear and sunny with a light breeze tending NE.
24 0.7 15.5 6.5 0.8 13 18 East Nth East 0 0 1014.7 1019.6 -4.9
Morning frost, clear and sunny with light breezes tending NE.
25 0.2 15.0 7.2 5.2 34 118 South Sth West 0 0 1012.7 1025.2 +12.5
Morning frost, sunny with some cloud from midday with a southerly change.
26 0.5 11.9 6.2 2.9 23 67 South Sth West 0.2 0.4 1024.4 1031.9 +6.5
Showers clearing by mid morning and cloud breaking to a mostly sunny afternoon. Cool southerly wind.
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