Blenheim in Fall
In fall (March, April and May), Blenheim sees average daytime highs around 16°C and overnight lows near 9°C, with 183 mm of rain over about 24 wet days across the season. It is the 2nd-warmest season and the driest season of the year.
Over the season highs ease from about 20°C in early March to 13°C by late May. The sky is clear or mostly clear about 40% of the time across fall, and the air most often feels dry.
Fall is Blenheim's 2nd-best season to visit on our travel score. For the whole year in context, see Blenheim's year-round climate.
- Avg daytime high
- 16°C
- 2nd-warmest season
- Avg overnight low
- 9°C
- Rainfall
- 183 mm
- 24 wet days
- Avg wind
- 14 km/h
- Travel score
- 5.5
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in Blenheim in Fall
Over the season highs ease from about 20°C in early March to 13°C by late May.
A typical fall day in Blenheim reaches about 16°C and drops to 9°C overnight. The warmest of the three months is March, the coolest May.
Blenheim weather by month
How the three fall months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 20° / 13° | 60 | 8.1 | 14.7 | 6.6 |
| Feb | 20° / 13° | 53 | 6.3 | 13.7 | 6.9 |
| Mar | 19° / 11° | 53 | 7.1 | 12.3 | 6.6 |
| Apr | 16° / 9° | 67 | 8.2 | 10.9 | 5.5 |
| May | 14° / 7° | 63 | 8.4 | 9.7 | 4.4 |
| Jun | 12° / 5° | 81 | 9.4 | 9.1 | 3.1 |
| Jul | 11° / 5° | 76 | 9.7 | 9.3 | 2.7 |
| Aug | 12° / 5° | 74 | 10.8 | 10.3 | 3.1 |
| Sep | 13° / 7° | 73 | 10.3 | 11.7 | 3.8 |
| Oct | 15° / 8° | 83 | 11.1 | 13.1 | 4.6 |
| Nov | 17° / 10° | 73 | 9.9 | 14.3 | 5.4 |
| Dec | 19° / 12° | 73 | 10.4 | 14.9 | 6.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 40% of the time across fall.
Chance of precipitation in Fall
Blenheim gets around 183 mm of rain over 24 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 14 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 hours in early March to 9 h 12 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.5 kWh/m².
Is fall a good time to visit Blenheim?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Blenheim for sightseeing.
What to pack for Blenheim in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Blenheim sees daytime highs around 16°C and nights near 9°C. Worth packing: a warm layer, rain gear and sun protection. About 24 days see rain.
Sea temperature near Blenheim in Fall
The nearest coast averages about 15°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 21 km away) is warmest in February at about 17°C and coldest in August near 12°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 17 | 16 | 15 | 14 | 13 | 12 | 12 | 12 | 13 | 14 | 15 |
| Comfort | Cool | Cool | Cool | Cool | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 17 | Cool |
| Mar | 16 | Cool |
| Apr | 15 | Cool |
| May | 14 | Bracing |
| Jun | 13 | Bracing |
| Jul | 12 | Bracing |
| Aug | 12 | Bracing |
| Sep | 12 | Bracing |
| Oct | 13 | Bracing |
| Nov | 14 | Bracing |
| Dec | 15 | Bracing |
UV index in Blenheim in Fall
Clear-sky midday UV across fall averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Blenheim peaks around January 11 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 16 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 11 | 10 | 6 | 4 | 2 | 1 | 2 | 3 | 4 | 6 | 9 | 11 |
| Level | Extreme | Extreme | High | Moderate | Low | Low | Low | Moderate | Moderate | High | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 10 | Extreme |
| Mar | 6 | High |
| Apr | 4 | Moderate |
| May | 2 | Low |
| Jun | 1 | Low |
| Jul | 2 | Low |
| Aug | 3 | Moderate |
| Sep | 4 | Moderate |
| Oct | 6 | High |
| Nov | 9 | Very high |
| Dec | 11 | Extreme |
Where is Blenheim?
Blenheim sits at 41.5°S, 174.0°E, 9 m above sea level, in New Zealand. The nearest listed city is Picton, 25 km away.
Topography around Blenheim
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Blenheim.
Within 3 km, the terrain around Blenheim has only modest variations in elevation — a maximum elevation change of 79 m around an average of 9 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 899 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,829 m.
The land around Blenheim is covered by grassland (47%) and artificial surfaces (32%) within 3 km, grassland (53%) and trees (24%) within 16 km, and water (47%), trees (28%) and grassland (21%) within 80 km.
New Zealand travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type I
- 230 V · 50 Hz
- Prices
- ≈ 86% of US
- price level, 2025
- GDP per capita
- $49,591
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1.5
- per 100k, 2022
- Road deaths
- 9.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Blenheim (-41.516°, 173.9528°, elevation 9 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.