United States · 1991–2020

Best time to visit
Rocklin.

October leads for comfortable weather in Rocklin: typically 24.3°C by day, 10.8°C at night, with 37 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high24.3°C

Typical low10.8°C

Rain in October37 mm

Comfort

October

October · May · June

91climate match

Beach

June

June · September · July

80climate match

Outdoors

October

October · April · May

85climate match

The weakest month is December, scoring 18 against October’s 91 — days reach only 12.7°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

1913° / 3.2°

Feb

2914.7° / 4.4°

Mar

4017° / 5.7°

Apr

6419.6° / 7.1°

May

8924.4° / 10.8°

Jun

8129.4° / 14.3°

Jul

6533.2° / 17.5°

Aug

6832.7° / 17°

Sep

8029.9° / 14.9°

Oct

9124.3° / 10.8°

Nov

5317.3° / 6.6°

Dec

1812.7° / 2.8°

Monthly climate evidence for Rocklin — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	13°C	3.2°C	156 mm	9.6	9 h 44	19	Strong coverage
February	14.7°C	4.4°C	150 mm	8.8	10 h 41	29	Strong coverage
March	17°C	5.7°C	143 mm	8.9	11 h 50	40	Strong coverage
April	19.6°C	7.1°C	70 mm	5.8	13 h 09	64	Strong coverage
May	24.4°C	10.8°C	42 mm	4.2	14 h 16	89	Strong coverage
June	29.4°C	14.3°C	12 mm	1.4	14 h 52	81	Strong coverage
July	33.2°C	17.5°C	0 mm	0	14 h 38	65	Strong coverage
August	32.7°C	17°C	1 mm	0.2	13 h 41	68	Strong coverage
September	29.9°C	14.9°C	8 mm	0.9	12 h 23	80	Strong coverage
October	24.3°C	10.8°C	37 mm	2.6	11 h 07	91	Strong coverage
November	17.3°C	6.6°C	86 mm	6.3	10 h 00	53	Strong coverage
December	12.7°C	2.8°C	158 mm	9.2	9 h 28	18	Strong coverage

What has changed

Rocklin runs -0.2°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

+0.9

Feb

-0.2

Mar

-0.7

Apr

+0.1

May

-0.8

Jun

-0.3

Jul

-0.8

Aug

-0.7

Sep

-0.6

Oct

-0.6

Nov

+0.3

Dec

+0.5

October daytime highs, 2011–2023. Last recorded: 21.9°C.

Records at AUBURN, 1905–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	27.2°C9 Jan 1962	-8.3°C18 Jan 1937	121 mm10 Jan 1995	586 mm1909 · driest 0 mm in 2015	112
February	25.6°C15 Feb 1943	-6.1°C27 Feb 1962	101 mm19 Feb 1986	447 mm1986 · driest 0 mm in 2020	112
March	33.9°C11 Mar 1910	-6.7°C28 Mar 1938	102 mm16 Mar 2020	426 mm1991 · driest 0 mm in 1926	118
April	33.3°C25 Apr 1946	-4.4°C12 Apr 2022	98 mm8 Apr 1935	253 mm1942 · driest 0 mm in 1949	118
May	38.9°C31 May 1950	-3.9°C8 May 1933	75 mm16 May 1996	142 mm1998 · driest 0 mm in 1976	118
June	43.3°C16 Jun 1961	-1.1°C9 Jun 1936	50 mm16 Jun 1929	75 mm2011 · driest 0 mm in 1987	115
July	45.0°C15 Jul 1972	2.2°C29 Jul 1919	52 mm9 Jul 1974	76 mm1974 · driest 0 mm in 1975	118
August	43.9°C10 Aug 1978	5.0°C4 Aug 1919	31 mm15 Aug 1976	41 mm1976 · driest 0 mm in 1994	118
September	42.8°C3 Sep 1950	1.1°C15 Sep 1906	51 mm12 Sep 1918	102 mm1918 · driest 0 mm in 1987	114
October	40.0°C8 Oct 1928	-3.3°C29 Oct 1922	137 mm13 Oct 1962	352 mm1962 · driest 0 mm in 1913	116
November	31.7°C1 Nov 1965	-3.9°C19 Nov 1977	96 mm21 Nov 1950	354 mm1950 · driest 0 mm in 1929	113
December	26.7°C15 Dec 1924	-15.0°C9 Dec 2013	102 mm20 Dec 1981	477 mm1955 · driest 0 mm in 1989	114

Typical days per month at AUBURN, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	5	4
February	0	0	2	4
March	2	0	1	4
April	4	<1	<1	2
May	13	5	0	1
June	21	13	0	<1
July	26	22	0	0
August	26	22	0	0
September	22	15	0	<1
October	13	4	<1	1
November	1	0	<1	3
December	0	0	6	4

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 88); on 2011–2025 it is October (90). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in AUBURN’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	3%	34%	19%	42%	10.3–14.8°C
February	11%	33%	18%	42%	12.2–17.1°C
March	27%	30%	16%	35%	13.8–19.7°C
April	51%	19%	9%	18%	17.6–23.0°C
May	79%	11%	4%	8%	21.3–27.1°C
June	94%	5%	1%	2%	27.2–32.4°C
July	100%	<1%	<1%	<1%	31.7–36.1°C
August	99%	<1%	<1%	<1%	31.1–34.9°C
September	95%	4%	1%	2%	27.3–32.5°C
October	78%	11%	5%	10%	22.0–27.3°C
November	33%	22%	12%	29%	14.7–21.2°C
December	4%	30%	16%	36%	10.5–15.5°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.

1906Each stripe is one year’s mean temperature against the 98-year average. Warmest: 2014. Coolest: 2020.2020

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5388319
NOAA station: USC00040383 · AUBURN
Station distance: 18.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 38.79°, mid-month, sunrise to sunset including refraction. Not a station measurement.
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 AUBURN is what differs

Lincoln→Granite Bay→Auburn→North Auburn→Loomis→Cool→

Or put two places side by side: Rocklin vs Lincoln

Best time to visitRocklin.

October

June

October

The whole year,without the guesswork.

Rocklin runs -0.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Rocklin.

The whole year,
without the guesswork.

Rocklin runs -0.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.