Weather in Te Anau in May

A hard month. May asks something of you. Go in knowing what. You should expect rain on 23 days of the month, which is more days wet than dry.

May ranks 8 of 12 in Te Anau: past the worst of the year but short of January, which is the month to book if the dates are open.

Rain on 23 of the month's 31 days, 7 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Layers, and a genuinely waterproof outer — at 10.8 °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 — 5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest May day reached 19.5 °C and the coldest night fell to -2.1 °C, and the wettest single day dropped 50 mm — roughly 26% of the month's rain in one day.

May is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest May on record still delivered 328 mm against 112 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 190 mm average is a reasonable planning figure, not a promise.

Wind is light at 8.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 94%, which at 10.8 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How May sits in the year

The month is on the way down: 2.8 °C cooler than April, with June dropping another 2.4 °C. The first week and the last are not the same trip.

Daylight in May

9.5 hours of daylight, losing 1.1 hours across the month. That is between Te Anau's extremes of 15.6 and 8.7 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 14.5 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

May in Te Anau versus nearby

If Te Anau is one option among several, the nearby comparison is worth making. Queenstown is close enough to be a coin toss — within a degree on temperature, 3 days less rain. Invercargill is close enough to be a coin toss — within a degree on temperature, 3 days less rain.

So: May is a compromise. January is 22 points better and is what Te Anau 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 Te Anau

See all twelve months in Te Anau, or where else to go in May.