Henderson weather in September

In September, Henderson sees average daytime highs of 14°C and overnight lows near 12°C, with 102 mm of rain across 13.4 wet days and about 11.7 hours of daylight. It is the 10th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 14°C through the month. The sky is clear or mostly clear about 26% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 12 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Henderson's 9th-clearest and 5th-windiest month. For the whole year in context, see Henderson's year-round climate.

Daytime high: 14°; 10th warmest
Overnight low: 12°; 3rd coldest
Rainfall: 102 mm; 13.4 wet days
Daylight: 11 h 48 min; 7:23 AM – 7:09 PM
Cloud cover: 61%; 9th clearest
Wind: 21 km/h; 5th windiest
Solar energy: 4.19 kWh/m²
Travel score: 4.0; out of 10

← August Henderson year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 14°C through the month.

A typical September day in Henderson reaches about 14°C in the afternoon and slips back to 12°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 16°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	15	15	15	15	15
Avg low (°C)	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12

	Avg high (°C)	Avg low (°C)
1	14	11
2	14	11
3	14	11
4	14	11
5	14	11
6	14	11
7	14	11
8	14	11
9	14	12
10	14	12
11	14	12
12	14	12
13	14	12
14	14	12
15	14	12
16	14	12
17	15	12
18	15	12
19	15	12
20	15	12
21	15	12
22	15	12
23	15	12
24	15	12
25	15	12
26	15	12
27	15	12
28	15	12
29	15	12
30	15	12

Henderson weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	21° / 18°	71	8.7	14.2	6.6
Feb	21° / 18°	61	7.8	13.4	6.7
Mar	20° / 17°	67	8	12.3	6.7
Apr	19° / 16°	82	9.8	11.1	6.0
May	17° / 14°	107	12.3	10.1	5.1
Jun	15° / 12°	116	12.7	9.5	4.1
Jul	14° / 11°	128	15	9.7	3.6
Aug	14° / 11°	115	15.2	10.6	3.6
Sep	14° / 12°	102	13.4	11.7	4.0
Oct	16° / 13°	84	11.9	13	4.6
Nov	17° / 14°	76	11.1	14	5.2
Dec	19° / 16°	91	10.9	14.5	5.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 25% of September, with mostly cloudy or overcast conditions the remaining 49%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	52	51	51	51	51	51	51	51	51	51	51	51	51	51	52	51	51	50	51	51	50	50	50	50	50	51	50	50	50	50
Cloudier (%)	48	49	49	49	49	49	49	49	49	49	49	49	49	49	48	49	49	50	49	49	50	50	50	50	50	49	50	50	50	50

	Clearer (%)	Cloudier (%)
1	52	48
2	51	49
3	51	49
4	51	49
5	51	49
6	51	49
7	51	49
8	51	49
9	51	49
10	51	49
11	51	49
12	51	49
13	51	49
14	51	49
15	52	48
16	51	49
17	51	49
18	50	50
19	51	49
20	51	49
21	50	50
22	50	50
23	50	50
24	50	50
25	50	50
26	51	49
27	50	50
28	50	50
29	50	50
30	50	50

Chance of precipitation in September

Any precipitation

Henderson gets around 102 mm of rain over 13.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 44% and peaks near 45% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	42	42	42	42	43	43	44	44	45	45	45	45	45	45	45	45	44	44	44	44	44	45	45	45	45	45	45	45	45	45

	Rain chance (%)
1	42
2	42
3	42
4	42
5	43
6	43
7	44
8	44
9	45
10	45
11	45
12	45
13	45
14	45
15	45
16	45
17	44
18	44
19	44
20	44
21	44
22	45
23	45
24	45
25	45
26	45
27	45
28	45
29	45
30	45

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	96	96	96	96	95	95	95	94	94	94	94	94	93	93	93	92	92	91	91	90	90	90	89	89	88	88	88	87	87	87
Comfortable (%)	4	4	4	4	5	5	5	6	6	6	6	6	7	7	7	8	8	9	9	10	10	10	11	11	12	12	12	13	13	13

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	95	5
6	95	5
7	95	5
8	94	6
9	94	6
10	94	6
11	94	6
12	94	6
13	93	7
14	93	7
15	93	7
16	92	8
17	92	8
18	91	9
19	91	9
20	90	10
21	90	10
22	90	10
23	89	11
24	89	11
25	88	12
26	88	12
27	88	12
28	87	13
29	87	13
30	87	13

Wind in September

Winds average 21 km/h in September.

Across September, daily wind ranges from about 21 km/h on the calmest days to 23 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	22	22	22	22	22	22	22	22	22	22	22	23
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

	Wind speed (km/h)	Feels
1	21	breezy
2	21	breezy
3	21	breezy
4	21	breezy
5	21	breezy
6	21	breezy
7	21	breezy
8	21	breezy
9	21	breezy
10	21	breezy
11	21	breezy
12	21	breezy
13	21	breezy
14	21	breezy
15	21	breezy
16	21	breezy
17	21	breezy
18	21	breezy
19	22	breezy
20	22	breezy
21	22	breezy
22	22	breezy
23	22	breezy
24	22	breezy
25	22	breezy
26	22	breezy
27	22	breezy
28	22	breezy
29	22	breezy
30	23	breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 12 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over September. Sunrise moves from 7:46 AM to 7:01 AM, and sunset from 6:56 PM to 7:21 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.2	11.2	11.3	11.3	11.3	11.4	11.4	11.4	11.5	11.5	11.6	11.6	11.6	11.7	11.7	11.8	11.8	11.8	11.9	11.9	12.0	12.0	12.1	12.1	12.1	12.2	12.2	12.3	12.3	12.3
Sunrise (AM)	7:46	7:45	7:43	7:42	7:40	7:38	7:37	7:35	7:34	7:32	7:31	7:29	7:28	7:26	7:24	7:23	7:21	7:20	7:18	7:16	7:15	7:13	7:12	7:10	7:09	7:07	7:05	7:04	7:02	7:01
Sunset (PM)	6:56	6:57	6:58	6:59	7:00	7:01	7:01	7:02	7:03	7:04	7:05	7:06	7:06	7:07	7:08	7:09	7:10	7:11	7:11	7:12	7:13	7:14	7:15	7:16	7:16	7:17	7:18	7:19	7:20	7:21

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.2	7:46	6:56
2	11.2	7:45	6:57
3	11.3	7:43	6:58
4	11.3	7:42	6:59
5	11.3	7:40	7:00
6	11.4	7:38	7:01
7	11.4	7:37	7:01
8	11.4	7:35	7:02
9	11.5	7:34	7:03
10	11.5	7:32	7:04
11	11.6	7:31	7:05
12	11.6	7:29	7:06
13	11.6	7:28	7:06
14	11.7	7:26	7:07
15	11.7	7:24	7:08
16	11.8	7:23	7:09
17	11.8	7:21	7:10
18	11.8	7:20	7:11
19	11.9	7:18	7:11
20	11.9	7:16	7:12
21	12.0	7:15	7:13
22	12.0	7:13	7:14
23	12.1	7:12	7:15
24	12.1	7:10	7:16
25	12.1	7:09	7:16
26	12.2	7:07	7:17
27	12.2	7:05	7:18
28	12.3	7:04	7:19
29	12.3	7:02	7:20
30	12.3	7:01	7:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.19 kWh/m².

For context, solar energy here swings from a low near 1.97 kWh/m² to a high of 7.25 kWh/m² in January across the year — September's 4.19 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	3.6	3.6	3.7	3.7	3.8	3.8	3.8	3.9	3.9	4.0	4.0	4.1	4.1	4.1	4.2	4.2	4.3	4.3	4.3	4.4	4.4	4.5	4.5	4.5	4.6	4.6	4.7	4.7	4.7	4.8
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.6	Moderate
2	3.6	Moderate
3	3.7	Moderate
4	3.7	Moderate
5	3.8	Moderate
6	3.8	Moderate
7	3.8	Moderate
8	3.9	Moderate
9	3.9	Moderate
10	4.0	Moderate
11	4.0	Bright
12	4.1	Bright
13	4.1	Bright
14	4.1	Bright
15	4.2	Bright
16	4.2	Bright
17	4.3	Bright
18	4.3	Bright
19	4.3	Bright
20	4.4	Bright
21	4.4	Bright
22	4.5	Bright
23	4.5	Bright
24	4.5	Bright
25	4.6	Bright
26	4.6	Bright
27	4.7	Bright
28	4.7	Bright
29	4.7	Bright
30	4.8	Bright

Planning a trip in September

Hazard calendar for Henderson

In seasonPeak

None of Henderson's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Henderson sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Cyclone

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Henderson?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.0

Sightseeing

10th-best month of the year

0.0

Beach & pool

10th-best month of the year

September is a reasonable time to visit Henderson for sightseeing.

What to pack for Henderson in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Henderson sees daytime highs around 14°C and nights near 12°C. Worth packing: a warm layer, rain gear and a windbreaker. About 13 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Henderson in September

The nearest coast averages about 14°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 km away) is warmest in February at about 21°C and coldest in August near 14°C.

It's comfortable for a long swim from Jan 18 to Mar 15 — about 1.9 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	20	21	20	19	17	16	15	14	14	15	17	19
Comfort	Refreshing	Refreshing	Refreshing	Cool	Cool	Cool	Bracing	Bracing	Bracing	Cool	Cool	Cool

	Sea temperature (°C)	Comfort
Jan	20	Refreshing
Feb	21	Refreshing
Mar	20	Refreshing
Apr	19	Cool
May	17	Cool
Jun	16	Cool
Jul	15	Bracing
Aug	14	Bracing
Sep	14	Bracing
Oct	15	Cool
Nov	17	Cool
Dec	19	Cool

UV index in Henderson in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Henderson peaks around January 12 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	12	11	8	5	3	2	3	4	5	8	11	12
Level	Extreme	Extreme	Very high	High	Moderate	Low	Moderate	Moderate	Moderate	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	12	Extreme
Feb	11	Extreme
Mar	8	Very high
Apr	5	High
May	3	Moderate
Jun	2	Low
Jul	3	Moderate
Aug	4	Moderate
Sep	5	Moderate
Oct	8	Very high
Nov	11	Extreme
Dec	12	Extreme

Location & terrain

Where is Henderson?

Henderson sits at 36.9°S, 174.6°E, 13 m above sea level, in New Zealand. The nearest listed city is Lincoln, 2.0 km away.

Topography around Henderson

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Henderson.

Within 3 km, the terrain around Henderson has only modest variations in elevation — a maximum elevation change of 107 m around an average of 36 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 465 m; within 80 km, large variations in elevation — a maximum elevation change of 905 m.

The land around Henderson is covered by artificial surfaces (47%) and trees (37%) within 3 km, trees (47%) and water (21%) within 16 km, and water (57%) and grassland (23%) within 80 km.

3 km

107 m

artificial surfaces 47%

16 km

465 m

trees 47%

80 km

905 m

water 57%

treesgrasslandcroplandartificial surfaceswatermangroves

← August Henderson year-round climate October →Best places to visit in September

September weather nearby: Lincoln 2.0 km · Te Atatu South 3.0 km · Massey 5.0 km · Te Atatu Peninsula 5.0 km · Massey East 6.0 km · New Lynn 7.0 km · Titirangi 7.0 km · Avondale 7.0 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 Henderson (-36.8801°, 174.6198°, elevation 13 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	14	11
2	14	11
3	14	11
4	14	11
5	14	11
6	14	11
7	14	11
8	14	11
9	14	12
10	14	12
11	14	12
12	14	12
13	14	12
14	14	12
15	14	12
16	14	12
17	15	12
18	15	12
19	15	12
20	15	12
21	15	12
22	15	12
23	15	12
24	15	12
25	15	12
26	15	12
27	15	12
28	15	12
29	15	12
30	15	12

	Clearer (%)	Cloudier (%)
1	52	48
2	51	49
3	51	49
4	51	49
5	51	49
6	51	49
7	51	49
8	51	49
9	51	49
10	51	49
11	51	49
12	51	49
13	51	49
14	51	49
15	52	48
16	51	49
17	51	49
18	50	50
19	51	49
20	51	49
21	50	50
22	50	50
23	50	50
24	50	50
25	50	50
26	51	49
27	50	50
28	50	50
29	50	50
30	50	50

	Rain chance (%)
1	42
2	42
3	42
4	42
5	43
6	43
7	44
8	44
9	45
10	45
11	45
12	45
13	45
14	45
15	45
16	45
17	44
18	44
19	44
20	44
21	44
22	45
23	45
24	45
25	45
26	45
27	45
28	45
29	45
30	45

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	95	5
6	95	5
7	95	5
8	94	6
9	94	6
10	94	6
11	94	6
12	94	6
13	93	7
14	93	7
15	93	7
16	92	8
17	92	8
18	91	9
19	91	9
20	90	10
21	90	10
22	90	10
23	89	11
24	89	11
25	88	12
26	88	12
27	88	12
28	87	13
29	87	13
30	87	13

	Avg high (°C)	Avg low (°C)
1	14	11
2	14	11
3	14	11
4	14	11
5	14	11
6	14	11
7	14	11
8	14	11
9	14	12
10	14	12
11	14	12
12	14	12
13	14	12
14	14	12
15	14	12
16	14	12
17	15	12
18	15	12
19	15	12
20	15	12
21	15	12
22	15	12
23	15	12
24	15	12
25	15	12
26	15	12
27	15	12
28	15	12
29	15	12
30	15	12

	Clearer (%)	Cloudier (%)
1	52	48
2	51	49
3	51	49
4	51	49
5	51	49
6	51	49
7	51	49
8	51	49
9	51	49
10	51	49
11	51	49
12	51	49
13	51	49
14	51	49
15	52	48
16	51	49
17	51	49
18	50	50
19	51	49
20	51	49
21	50	50
22	50	50
23	50	50
24	50	50
25	50	50
26	51	49
27	50	50
28	50	50
29	50	50
30	50	50

	Rain chance (%)
1	42
2	42
3	42
4	42
5	43
6	43
7	44
8	44
9	45
10	45
11	45
12	45
13	45
14	45
15	45
16	45
17	44
18	44
19	44
20	44
21	44
22	45
23	45
24	45
25	45
26	45
27	45
28	45
29	45
30	45

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	95	5
6	95	5
7	95	5
8	94	6
9	94	6
10	94	6
11	94	6
12	94	6
13	93	7
14	93	7
15	93	7
16	92	8
17	92	8
18	91	9
19	91	9
20	90	10
21	90	10
22	90	10
23	89	11
24	89	11
25	88	12
26	88	12
27	88	12
28	87	13
29	87	13
30	87	13

	Avg high (°C)	Avg low (°C)
1	14	11
2	14	11
3	14	11
4	14	11
5	14	11
6	14	11
7	14	11
8	14	11
9	14	12
10	14	12
11	14	12
12	14	12
13	14	12
14	14	12
15	14	12
16	14	12
17	15	12
18	15	12
19	15	12
20	15	12
21	15	12
22	15	12
23	15	12
24	15	12
25	15	12
26	15	12
27	15	12
28	15	12
29	15	12
30	15	12

	Clearer (%)	Cloudier (%)
1	52	48
2	51	49
3	51	49
4	51	49
5	51	49
6	51	49
7	51	49
8	51	49
9	51	49
10	51	49
11	51	49
12	51	49
13	51	49
14	51	49
15	52	48
16	51	49
17	51	49
18	50	50
19	51	49
20	51	49
21	50	50
22	50	50
23	50	50
24	50	50
25	50	50
26	51	49
27	50	50
28	50	50
29	50	50
30	50	50

	Rain chance (%)
1	42
2	42
3	42
4	42
5	43
6	43
7	44
8	44
9	45
10	45
11	45
12	45
13	45
14	45
15	45
16	45
17	44
18	44
19	44
20	44
21	44
22	45
23	45
24	45
25	45
26	45
27	45
28	45
29	45
30	45

	Dry (%)	Comfortable (%)
1	96	4
2	96	4
3	96	4
4	96	4
5	95	5
6	95	5
7	95	5
8	94	6
9	94	6
10	94	6
11	94	6
12	94	6
13	93	7
14	93	7
15	93	7
16	92	8
17	92	8
18	91	9
19	91	9
20	90	10
21	90	10
22	90	10
23	89	11
24	89	11
25	88	12
26	88	12
27	88	12
28	87	13
29	87	13
30	87	13