Blenheim in Spring
In spring (September, October and November), Blenheim sees average daytime highs around 15°C and overnight lows near 8°C, with 229 mm of rain over about 31 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs climb from about 13°C in early September to 18°C by late November. The sky is clear or mostly clear about 31% of the time across spring, and the air most often feels dry.
Spring is Blenheim's 3rd-best season to visit on our travel score. For the whole year in context, see Blenheim's year-round climate.
- Avg daytime high
- 15°C
- 3rd-warmest season
- Avg overnight low
- 8°C
- Rainfall
- 229 mm
- 31 wet days
- Avg wind
- 16 km/h
- Travel score
- 4.6
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Blenheim in Spring
Over the season highs climb from about 13°C in early September to 18°C by late November.
A typical spring day in Blenheim reaches about 15°C and drops to 8°C overnight. The warmest of the three months is November, the coolest September.
Blenheim weather by month
How the three spring months (September, October and November) 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 Spring
The sky is clear or mostly clear about 31% of the time across spring.
Chance of precipitation in Spring
Blenheim gets around 229 mm of rain over 31 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 16 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 hours in early September to 14 h 48 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.4 kWh/m².
Is spring a good time to visit Blenheim?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Blenheim for sightseeing.
What to pack for Blenheim in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Blenheim sees daytime highs around 15°C and nights near 8°C. Pack sun protection. Worth having: a warm layer and rain gear. About 31 days see rain.
Sea temperature near Blenheim in Spring
The nearest coast averages about 13°C across spring — 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 Spring
Clear-sky midday UV across spring averages around 6 — 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.