Australia · 1991–2020

Best time to visit
Seisia.

July leads for comfortable weather in Seisia: typically 29°C by day, 23.2°C at night, with 9 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high29°C

Typical low23.2°C

Rain in July9 mm

Comfort

July

July · August · June

69climate match

Beach

August

August · July · June

94climate match

Outdoors

July

July · August · June

49climate match

The weakest month is January, scoring 5 against July’s 69 — 419 mm of rain falls.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

531° / 25.2°

Feb

530.6° / 25.1°

Mar

530.5° / 25.1°

Apr

2430.6° / 25.3°

May

5430.1° / 24.9°

Jun

6529.4° / 24°

Jul

6929° / 23.2°

Aug

6829.1° / 23.1°

Sep

6430.1° / 23.9°

Oct

5931° / 24.8°

Nov

5332° / 25.8°

Dec

2732° / 25.8°

Monthly climate evidence for Seisia — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 25 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	31°C	25.2°C	419 mm	19.1	29.3°C	12 h 42	5	Good coverage
February	30.6°C	25.1°C	451 mm	18	29.1°C	12 h 28	5	Strong coverage
March	30.5°C	25.1°C	370 mm	17.4	29.0°C	12 h 11	5	Strong coverage
April	30.6°C	25.3°C	231 mm	11.9	28.4°C	11 h 52	24	Good coverage
May	30.1°C	24.9°C	65 mm	7	27.2°C	11 h 37	54	Strong coverage
June	29.4°C	24°C	16 mm	4.1	26.1°C	11 h 30	65	Strong coverage
July	29°C	23.2°C	9 mm	3.4	25.2°C	11 h 33	69	Strong coverage
August	29.1°C	23.1°C	6 mm	1.8	25.0°C	11 h 45	68	Strong coverage
September	30.1°C	23.9°C	2 mm	0.9	25.7°C	12 h 03	64	Strong coverage
October	31°C	24.8°C	14 mm	2	26.8°C	12 h 22	59	Strong coverage
November	32°C	25.8°C	43 mm	3.1	28.1°C	12 h 38	53	Good coverage
December	32°C	25.8°C	183 mm	10.3	29.3°C	12 h 45	27	Strong coverage

Records at HORN ISLAND, 1995–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	36.7°C10 Jan 1998	21.5°C8 Jan 2022	154 mm23 Jan 2024	773 mm2024 · driest 58 mm in 2016	31
February	36.0°C6 Feb 2003	21.1°C9 Feb 2007	197 mm21 Feb 1997	879 mm2004 · driest 187 mm in 2019	31
March	34.8°C24 Mar 2003	21.1°C13 Mar 2015	146 mm21 Mar 1998	591 mm2024 · driest 123 mm in 2008	31
April	33.9°C6 Apr 2003	21.1°C5 Apr 2012	144 mm23 Apr 2022	810 mm2025 · driest 4 mm in 1995	31
May	32.2°C15 May 2016	18.9°C24 May 2009	111 mm10 May 1996	318 mm1996 · driest 1 mm in 1997	32
June	32.4°C18 Jun 2002	18.1°C7 Jun 2016	30 mm1 Jun 1999	46 mm1999 · driest 2 mm in 2011	32
July	31.8°C24 Jul 2021	17.3°C16 Jul 1995	36 mm4 Jul 2022	41 mm1997 · driest 2 mm in 1995	31
August	31.8°C30 Aug 2022	17.3°C5 Aug 2004	18 mm8 Aug 2023	22 mm2023 · driest 0 mm in 2004	31
September	35.8°C29 Sep 2002	17.1°C8 Sep 1997	6 mm12 Sep 2021	18 mm2024 · driest 0 mm in 2012	31
October	35.2°C13 Oct 2011	18.4°C10 Oct 2004	103 mm23 Oct 2012	120 mm2012 · driest 0 mm in 2004	31
November	36.6°C20 Nov 2012	19.9°C2 Nov 2000	120 mm30 Nov 2000	202 mm2001 · driest 0 mm in 2019	30
December	37.9°C8 Dec 2002	20.3°C7 Dec 2002	216 mm30 Dec 2016	707 mm2000 · driest 0 mm in 1997	31

Typical days per month at HORN ISLAND, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	30	23	10
February	28	19	10
March	30	21	10
April	29	23	5
May	30	18	1
June	29	7	<1
July	30	3	0
August	30	5	0
September	29	16	0
October	30	26	<1
November	29	28	<1
December	29	27	5

How often, not how much — every day in HORN ISLAND’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	36%	64%	35%	86%	30.3–31.6°C
February	37%	63%	37%	83%	29.8–31.4°C
March	43%	57%	32%	78%	29.9–31.1°C
April	58%	42%	20%	51%	30.0–31.2°C
May	77%	23%	5%	22%	29.5–30.7°C
June	86%	14%	<1%	8%	28.9–30.3°C
July	89%	11%	<1%	6%	28.4–29.7°C
August	94%	6%	<1%	<1%	28.5–30.2°C
September	96%	4%	0%	2%	29.5–31.0°C
October	94%	7%	<1%	4%	30.4–32.0°C
November	89%	11%	3%	15%	31.4–33.0°C
December	64%	35%	18%	52%	30.9–33.1°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1997Each stripe is one year’s mean temperature against the 28-year average. Warmest: 2016. Coolest: 1997.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 8348211
NOAA station: ASN00027058 · HORN ISLAND
Station distance: 30.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 24 usable years
Daylight: Calculated from latitude -10.85°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 25 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from HORN ISLAND is what differs

Thursday Island→Bamaga→New Mapoon→Horn→Umagico→Punsand→

Or put two places side by side: Seisia vs Thursday Island

Best time to visitSeisia.

July

August

July

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Seisia.

The whole year,
without the guesswork.

Nearby, measured,
and named.