Australia · 1991–2020

Best time to visit
Chatswood.

October leads for comfortable weather in Chatswood: typically 23.2°C by day, 12.9°C at night, with 63 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high23.2°C

Typical low12.9°C

Rain in October63 mm

Comfort

October

October · November · December

87climate match

Beach

January

January · December · February

72climate match

Outdoors

September

September · August · May

87climate match

The weakest month is June, scoring 52 against October’s 87 — days reach only 17.8°C, 6° 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

7027.2° / 18.6°

Feb

6926.8° / 18.6°

Mar

7725.4° / 16.7°

Apr

7923° / 13.6°

May

6620.2° / 10.6°

Jun

5217.8° / 8.7°

Jul

5517.3° / 7.3°

Aug

6419° / 8.2°

Sep

7921.6° / 10.7°

Oct

8723.2° / 12.9°

Nov

8724.2° / 15.3°

Dec

8125.9° / 17°

Monthly climate evidence for Chatswood — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 20 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	27.2°C	18.6°C	94 mm	8.3	22.8°C	14 h 10	70	Good coverage
February	26.8°C	18.6°C	109 mm	8.7	23.4°C	13 h 22	69	Good coverage
March	25.4°C	16.7°C	102 mm	9.5	23.2°C	12 h 24	77	Good coverage
April	23°C	13.6°C	110 mm	7.9	22.3°C	11 h 18	79	Good coverage
May	20.2°C	10.6°C	101 mm	8.1	21.0°C	10 h 24	66	Good coverage
June	17.8°C	8.7°C	113 mm	8.9	19.6°C	9 h 55	52	Good coverage
July	17.3°C	7.3°C	71 mm	6.9	18.6°C	10 h 06	55	Good coverage
August	19°C	8.2°C	70 mm	5.4	18.1°C	10 h 52	64	Good coverage
September	21.6°C	10.7°C	57 mm	5.4	18.3°C	11 h 56	79	Good coverage
October	23.2°C	12.9°C	63 mm	6.3	19.2°C	13 h	87	Good coverage
November	24.2°C	15.3°C	82 mm	8.9	20.1°C	13 h 56	87	Good coverage
December	25.9°C	17°C	68 mm	7.6	21.4°C	14 h 23	81	Good coverage

Records at RIVERVIEW OBSERVATORY, 1962–2015
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	45.4°C18 Jan 2013	11.3°C9 Jan 1965	106 mm29 Jan 2013	341 mm1972 · driest 2 mm in 2009	31
February	41.3°C5 Feb 2011	11.1°C22 Feb 1972	78 mm12 Feb 1997	253 mm2002 · driest 13 mm in 2000	30
March	40.2°C6 Mar 1965	7.4°C24 Mar 1967	85 mm8 Mar 2012	256 mm2000 · driest 12 mm in 1965	29
April	32.7°C5 Apr 2006	5.7°C29 Apr 2008	142 mm11 Apr 1998	280 mm1998 · driest 5 mm in 2006	30
May	28.5°C1 May 1994	3.4°C22 May 1965	129 mm19 May 1998	339 mm2003 · driest 6 mm in 2008	28
June	24.9°C14 Jun 2004	1.2°C30 Jun 2010	111 mm9 Jun 2007	471 mm2007 · driest 4 mm in 1962	31
July	24.5°C4 Jul 2004	-1.7°C26 Jul 1968	107 mm22 Jul 2011	268 mm2011 · driest 2 mm in 1970	31
August	30.2°C26 Aug 1995	1.4°C12 Aug 1964	126 mm20 Aug 2007	388 mm1998 · driest 0 mm in 1995	30
September	34.8°C26 Sep 1965	1.7°C1 Sep 1967	115 mm2 Sep 1970	212 mm2006 · driest 5 mm in 2003	29
October	38.0°C13 Oct 2004	5.6°C8 Oct 1998	81 mm21 Oct 2004	274 mm2004 · driest 2 mm in 1971	30
November	40.5°C25 Nov 2002	6.9°C13 Nov 1965	135 mm14 Nov 1969	306 mm1969 · driest 10 mm in 1962	31
December	43.5°C21 Dec 1994	8.3°C2 Dec 2002	102 mm9 Dec 1970	255 mm1970 · driest 5 mm in 2013	32

Typical days per month at RIVERVIEW OBSERVATORY, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	19	6	3
February	18	5	3
March	15	3	3
April	7	<1	3
May	1	0	3
June	0	0	3
July	0	0	2
August	1	0	1
September	5	1	1
October	9	3	2
November	10	3	3
December	15	5	2

How often, not how much — every day in RIVERVIEW OBSERVATORY’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	70%	29%	9%	35%	24.7–28.9°C
February	69%	32%	10%	42%	25.1–28.2°C
March	68%	32%	10%	39%	24.1–26.5°C
April	66%	29%	10%	34%	21.6–24.7°C
May	45%	26%	8%	31%	19.4–20.9°C
June	14%	29%	10%	35%	16.9–19.1°C
July	11%	22%	7%	23%	16.3–18.7°C
August	31%	22%	6%	24%	17.7–20.5°C
September	52%	23%	5%	25%	19.2–22.8°C
October	62%	25%	6%	27%	21.6–25.2°C
November	63%	28%	8%	33%	23.1–25.5°C
December	71%	26%	8%	27%	24.5–27.3°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.

1964Each stripe is one year’s mean temperature against the 24-year average. Warmest: 2009. Coolest: 1966.2011

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2171707
NOAA station: ASN00066131 · RIVERVIEW OBSERVATORY
Station distance: 3.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude -33.80°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 20 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 RIVERVIEW OBSERVATORY is what differs

Ryde→Marsfield→Lane Cove→Pymble→Drummoyne→Gladesville→

Or put two places side by side: Chatswood vs Ryde

Best time to visitChatswood.