Australia · 1991–2020

Best time to visit
Grantville.

January leads for comfortable weather in Grantville: typically 24°C by day, 15.6°C at night, with 36 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJanuary

Typical high24°C

Typical low15.6°C

Rain in January36 mm

Comfort

January

January · February · March

97climate match

Beach

February

February · January · March

69climate match

Outdoors

November

November · April · December

84climate match

The weakest month is July, scoring 39 against January’s 97 — days reach only 13.4°C, 11° below the 24°C the score treats as ideal.

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

9724° / 15.6°

Feb

9524.3° / 15.9°

Mar

9122.6° / 14.8°

Apr

7219.5° / 12.7°

May

5316.3° / 10.8°

Jun

4514° / 8.9°

Jul

3913.4° / 8.2°

Aug

4014.2° / 8.3°

Sep

5116° / 9.4°

Oct

6318.1° / 10.6°

Nov

7320.2° / 12.3°

Dec

8622° / 13.8°

Monthly climate evidence for Grantville — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 26 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	24°C	15.6°C	36 mm	5.3	18.4°C	14 h 34	97	Strong coverage
February	24.3°C	15.9°C	42 mm	4.6	18.9°C	13 h 36	95	Strong coverage
March	22.6°C	14.8°C	42 mm	6.6	18.4°C	12 h 27	91	Strong coverage
April	19.5°C	12.7°C	65 mm	8.8	17.1°C	11 h 09	72	Strong coverage
May	16.3°C	10.8°C	80 mm	11.3	15.7°C	10 h 05	53	Strong coverage
June	14°C	8.9°C	68 mm	10.4	14.4°C	9 h 30	45	Strong coverage
July	13.4°C	8.2°C	71 mm	12.6	13.2°C	9 h 44	39	Strong coverage
August	14.2°C	8.3°C	83 mm	13.6	12.7°C	10 h 39	40	Strong coverage
September	16°C	9.4°C	71 mm	12	13.0°C	11 h 54	51	Strong coverage
October	18.1°C	10.6°C	62 mm	9.8	13.9°C	13 h 10	63	Strong coverage
November	20.2°C	12.3°C	65 mm	8.5	15.3°C	14 h 17	73	Strong coverage
December	22°C	13.8°C	47 mm	6.7	16.8°C	14 h 50	86	Strong coverage

Records at RHYLL, 1990–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	40.2°C13 Jan 2016	9.2°C18 Jan 2004	41 mm28 Jan 1995	90 mm1995 · driest 3 mm in 2026	36
February	42.1°C7 Feb 2009	7.9°C21 Feb 1996	105 mm3 Feb 2005	142 mm2005 · driest 3 mm in 2022	36
March	37.9°C7 Mar 1991	8.8°C1 Mar 2003	41 mm5 Mar 2020	81 mm1995 · driest 6 mm in 2024	36
April	31.1°C1 Apr 2014	0.3°C30 Apr 1994	68 mm23 Apr 2001	138 mm2020 · driest 14 mm in 2025	36
May	25.2°C1 May 2026	-0.1°C3 May 1991	56 mm4 May 2012	178 mm2012 · driest 23 mm in 2009	36
June	20.9°C6 Jun 1991	-0.9°C30 Jun 1992	40 mm22 Jun 2012	135 mm2022 · driest 2 mm in 1994	36
July	19.3°C7 Jul 1994	-0.3°C5 Jul 1992	45 mm6 Jul 2014	137 mm1996 · driest 23 mm in 2001	37
August	25.7°C16 Aug 1993	0.4°C16 Aug 1991	37 mm27 Aug 1999	155 mm2005 · driest 16 mm in 2024	36
September	25.2°C30 Sep 2023	1.7°C26 Sep 1993	56 mm19 Sep 2013	129 mm1996 · driest 31 mm in 2023	36
October	30.9°C6 Oct 2015	0.3°C14 Oct 1993	44 mm31 Oct 2010	113 mm2022 · driest 10 mm in 2015	36
November	35.5°C26 Nov 1997	5.2°C19 Nov 1994	44 mm13 Nov 2013	126 mm2025 · driest 19 mm in 2003	36
December	38.2°C19 Dec 2015	3.1°C18 Dec 1995	41 mm13 Dec 2008	82 mm2018 · driest 6 mm in 1997	36

Typical days per month at RHYLL, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	11	4	1
February	11	4	1
March	8	2	1
April	2	<1	2
May	0	0	2
June	0	0	2
July	0	0	1
August	0	0	2
September	0	0	2
October	2	<1	2
November	5	<1	2
December	7	3	1

How often, not how much — every day in RHYLL’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	74%	17%	4%	12%	22.5–25.8°C
February	75%	16%	4%	13%	22.7–26.3°C
March	66%	20%	4%	17%	21.3–24.6°C
April	37%	29%	6%	38%	18.1–21.1°C
May	6%	36%	7%	47%	15.6–17.5°C
June	0%	35%	7%	48%	13.4–14.8°C
July	0%	41%	5%	60%	12.6–14.1°C
August	1%	42%	7%	61%	13.3–15.4°C
September	10%	40%	7%	51%	14.8–17.3°C
October	24%	33%	7%	44%	16.7–19.2°C
November	38%	29%	7%	32%	18.5–22.0°C
December	53%	22%	5%	18%	20.3–23.7°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.

1991Each stripe is one year’s mean temperature against the 35-year average. Warmest: 2007. Coolest: 1992.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2164694
NOAA station: ASN00086373 · RHYLL
Station distance: 20.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude -38.41°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 26 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 RHYLL is what differs

Phillip Island→Cowes→Cape Woolamai→San Remo→Corinella→Coronet Bay→

Or put two places side by side: Grantville vs Phillip Island

Best time to visitGrantville.