Australia · 1991–2020

Best time to visit
Baulkham Hills.

April leads for comfortable weather in Baulkham Hills: typically 23.9°C by day, 12.6°C at night, with 78 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortApril

Typical high23.9°C

Typical low12.6°C

Rain in April78 mm

Comfort

April

April · October · November

86climate match

Beach

January

January · December · February

75climate match

Outdoors

August

August · May · September

89climate match

The weakest month is June, scoring 54 against April’s 86 — days reach only 18.2°C, 6° below the 24°C the score treats as ideal, and nights drop to 7.5°C.

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

6529.1° / 17.8°

Feb

6228.3° / 17.7°

Mar

7526.5° / 15.9°

Apr

8623.9° / 12.6°

May

7320.9° / 9.6°

Jun

5418.2° / 7.5°

Jul

5917.8° / 6.3°

Aug

6719.5° / 6.9°

Sep

8022.3° / 9.4°

Oct

8624.5° / 12°

Nov

8125.9° / 14.2°

Dec

7427.7° / 16.4°

Monthly climate evidence for Baulkham Hills — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 38 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	29.1°C	17.8°C	89 mm	8.6	22.8°C	14 h 10	65	Strong coverage
February	28.3°C	17.7°C	135 mm	9	23.4°C	13 h 21	62	Strong coverage
March	26.5°C	15.9°C	99 mm	9.9	23.2°C	12 h 24	75	Strong coverage
April	23.9°C	12.6°C	78 mm	7	22.3°C	11 h 18	86	Strong coverage
May	20.9°C	9.6°C	62 mm	6.4	21.0°C	10 h 24	73	Strong coverage
June	18.2°C	7.5°C	99 mm	7.9	19.6°C	9 h 55	54	Strong coverage
July	17.8°C	6.3°C	48 mm	6	18.6°C	10 h 06	59	Strong coverage
August	19.5°C	6.9°C	47 mm	4.8	18.1°C	10 h 52	67	Strong coverage
September	22.3°C	9.4°C	48 mm	5.7	18.3°C	11 h 56	80	Strong coverage
October	24.5°C	12°C	61 mm	7	19.2°C	13 h	86	Strong coverage
November	25.9°C	14.2°C	80 mm	8.5	20.1°C	13 h 56	81	Strong coverage
December	27.7°C	16.4°C	81 mm	8.5	21.4°C	14 h 23	74	Strong coverage

What has changed

Baulkham Hills runs +0.8°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+1.2

Feb

+0.6

Mar

+0.5

Apr

+0.2

May

+0.7

Jun

+0.5

Jul

+1.0

Aug

+0.9

Sep

+1.4

Oct

+1.2

Nov

+1.1

Dec

+0.8

April daytime highs, 2011–2025. Last recorded: 24.6°C.

Records at PARRAMATTA NORTH (MASONS DRIVE, 1967–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	47.0°C4 Jan 2020	10.1°C14 Jan 1997	100 mm29 Jan 1978	319 mm2016 · driest 7 mm in 1985	59
February	44.5°C1 Feb 2020	9.2°C28 Feb 1989	190 mm3 Feb 1990	673 mm1990 · driest 9 mm in 2016	59
March	40.5°C9 Mar 1983	6.8°C1 Mar 1989	110 mm20 Mar 1978	554 mm2022 · driest 8 mm in 1986	59
April	37.0°C4 Apr 1986	4.0°C23 Apr 1991	140 mm30 Apr 1988	476 mm1988 · driest 3 mm in 1997	59
May	29.2°C1 May 1994	2.0°C30 May 2017	154 mm1 May 1988	250 mm2003 · driest 2 mm in 1982	58
June	25.5°C14 Jun 2004	0.8°C4 Jun 2000	209 mm11 Jun 1991	374 mm1991 · driest 3 mm in 2022	60
July	26.8°C30 Jul 2017	-1.0°C27 Jul 1986	138 mm6 Jul 1988	339 mm2022 · driest 0 mm in 1970	60
August	30.6°C26 Aug 1995	0.7°C20 Aug 1996	113 mm2 Aug 1990	264 mm1998 · driest 0 mm in 1995	59
September	36.5°C23 Sep 2017	0.7°C1 Sep 2012	164 mm2 Sep 1970	233 mm1970 · driest 0 mm in 2017	59
October	40.1°C21 Oct 1988	3.6°C8 Oct 1998	107 mm25 Oct 1987	237 mm2004 · driest 0 mm in 1988	59
November	42.7°C25 Nov 1982	4.0°C20 Nov 1989	104 mm14 Nov 1986	236 mm1969 · driest 8 mm in 1982	59
December	44.0°C31 Dec 2019	7.7°C13 Dec 1995	91 mm9 Dec 1970	266 mm1970 · driest 1 mm in 2019	59

Typical days per month at PARRAMATTA NORTH (MASONS DRIVE, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	24	12	3
February	22	9	3
March	20	5	3
April	11	1	2
May	3	0	2
June	<1	0	3
July	<1	0	1
August	2	<1	1
September	7	2	1
October	13	5	2
November	15	6	3
December	21	10	2

How often, not how much — every day in PARRAMATTA NORTH (MASONS DRIVE’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%	30%	9%	37%	26.2–30.7°C
February	67%	32%	12%	40%	25.9–30.0°C
March	67%	33%	11%	41%	24.8–27.6°C
April	71%	24%	8%	28%	22.5–25.1°C
May	51%	23%	7%	25%	19.6–21.7°C
June	15%	25%	7%	27%	16.8–19.0°C
July	14%	18%	4%	17%	16.4–18.8°C
August	33%	17%	4%	16%	17.8–20.6°C
September	57%	19%	5%	19%	19.7–23.8°C
October	66%	24%	6%	29%	22.2–26.1°C
November	67%	29%	9%	34%	23.3–27.8°C
December	74%	25%	7%	26%	25.6–30.0°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.

1968Each stripe is one year’s mean temperature against the 52-year average. Warmest: 2024. Coolest: 1992.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2176592
NOAA station: ASN00066124 · PARRAMATTA NORTH (MASONS DRIVE
Station distance: 4.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude -33.76°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 38 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 PARRAMATTA NORTH (MASONS DRIVE is what differs

Castle Hill→Parramatta→Merrylands→Kellyville→Carlingford→Epping→

Or put two places side by side: Baulkham Hills vs Castle Hill

Best time to visitBaulkham Hills.