Weather in New Plymouth in July

A hard month. July asks something of you. Go in knowing what. Highs sit at 12.6 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

July ranks 12 of 12 — near the bottom of New Plymouth's year. January is the month that works, and the swing between the two is 37 points, which is a different holiday rather than a slightly better one.

Rain on 17 days, 4 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 12.6 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

Averages flatten a month, and this one hides a few things: the day barely swings — 4.9 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest July day reached 16.3 °C and the coldest night fell to 1.4 °C, and the wettest single day dropped 38 mm — roughly 31% of the month's rain in one day.

July is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest July on record still delivered 222 mm against 49 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 121 mm average is a reasonable planning figure, not a promise.

Wind is light at 15.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 88%, which at 12.6 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How July sits in the year

Temperatures hold steady either side: 13.7 °C in June, 12.6 here, 13.2 in August. Nothing about the timing within the month matters much.

Daylight in July

July sits at the dark end of New Plymouth's year — 9.7 hours of daylight against 14.9 at midsummer, gaining 0.6 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

Sea temperature

The sea sits at about 14.9 °C in July — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. The sea peaks at 20.2 °C in February and bottoms out at 14.2 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

July in New Plymouth versus nearby

If New Plymouth is one option among several, the nearby comparison is worth making. Taupo is close enough to be a coin toss — 2.5 °C cooler, 2 days less rain. Palmerston North is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: July is a compromise. January is 37 points better and is what New Plymouth is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in New Plymouth

See all twelve months in New Plymouth, or where else to go in July.