United States · 1991–2020

Best time to visit
Saint James.

September leads for comfortable weather in Saint James: typically 26.9°C by day, 14.9°C at night, with 102 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.9°C

Typical low14.9°C

Rain in September102 mm

Comfort

September

September · May · October

78climate match

Beach

June

June · August · July

72climate match

Outdoors

October

October · April · September

83climate match

The weakest month is January, scoring 5 against September’s 78 — days reach only 4.9°C, 19° 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

54.9° / -5.3°

Feb

67.8° / -3.3°

Mar

2513.3° / 1.6°

Apr

5319.6° / 7.4°

May

7424.4° / 13.1°

Jun

6228.9° / 18°

Jul

4931.6° / 20.3°

Aug

5431.1° / 19.4°

Sep

7826.9° / 14.9°

Oct

6720.6° / 8.4°

Nov

2813.2° / 2.4°

Dec

57.1° / -2.7°

Monthly climate evidence for Saint James — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.9°C	-5.3°C	69 mm	6.6	9 h 48	5	Strong coverage
February	7.8°C	-3.3°C	63 mm	6.7	10 h 43	6	Strong coverage
March	13.3°C	1.6°C	105 mm	9.7	11 h 50	25	Strong coverage
April	19.6°C	7.4°C	124 mm	9.5	13 h 08	53	Strong coverage
May	24.4°C	13.1°C	139 mm	10.4	14 h 12	74	Strong coverage
June	28.9°C	18°C	111 mm	8.8	14 h 47	62	Strong coverage
July	31.6°C	20.3°C	120 mm	8	14 h 33	49	Strong coverage
August	31.1°C	19.4°C	115 mm	7.1	13 h 38	54	Strong coverage
September	26.9°C	14.9°C	102 mm	6.7	12 h 23	78	Strong coverage
October	20.6°C	8.4°C	83 mm	6.9	11 h 09	67	Strong coverage
November	13.2°C	2.4°C	100 mm	7.8	10 h 04	28	Strong coverage
December	7.1°C	-2.7°C	72 mm	6.4	9 h 32	5	Strong coverage

What has changed

Saint James runs +1.0°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

+0.7

Feb

+1.1

Mar

+1.8

Apr

+0.5

May

+0.4

Jun

+1.2

Jul

+0.5

Aug

-0.2

Sep

+1.6

Oct

+0.9

Nov

+0.6

Dec

+2.9

September daytime highs, 2011–2025. Last recorded: 29.1°C.

Records at ROLLA MISSOURI S&T, 1896–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.6°C24 Jan 1943	-31.1°C13 Jan 1912	101 mm3 Jan 1897	247 mm1916 · driest 2 mm in 1986	120
February	28.9°C1 Feb 1911	-30.0°C13 Feb 1905	61 mm6 Feb 2008	172 mm2008 · driest 3 mm in 1917	119
March	33.3°C23 Mar 2026	-19.4°C5 Mar 1960	87 mm18 Mar 2008	246 mm1945 · driest 8 mm in 1910	116
April	33.9°C21 Apr 1987	-10.6°C5 Apr 1920	129 mm24 Apr 1953	304 mm1994 · driest 23 mm in 1962	119
May	37.2°C27 May 2012	-0.6°C10 May 1966	98 mm18 May 1997	327 mm1957 · driest 20 mm in 1932	119
June	40.6°C29 Jun 2012	4.4°C16 Jun 1917	126 mm11 Jun 1958	392 mm1985 · driest 3 mm in 1933	119
July	45.0°C15 Jul 1954	9.4°C23 Jul 1947	201 mm26 Jul 1998	398 mm1998 · driest 13 mm in 1934	116
August	42.2°C8 Aug 1934	5.6°C31 Aug 1915	125 mm26 Aug 1975	312 mm1915 · driest 10 mm in 1938	117
September	40.6°C4 Sep 1913	0.0°C28 Sep 1942	117 mm23 Sep 1970	372 mm1993 · driest 1 mm in 2004	118
October	34.4°C4 Oct 1954	-7.2°C28 Oct 1925	125 mm26 Oct 1919	378 mm1919 · driest 5 mm in 2010	118
November	29.4°C7 Nov 1915	-16.1°C17 Nov 1959	124 mm5 Nov 2024	299 mm1985 · driest 5 mm in 1949	120
December	26.1°C28 Dec 1928	-28.3°C22 Dec 1989	166 mm3 Dec 1982	321 mm2015 · driest 4 mm in 1912	118

Typical days per month at ROLLA MISSOURI S&T, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	2	5
February	<1	0	21	2	5
March	2	0	13	3	3
April	7	<1	3	4	<1
May	16	5	0	5	0
June	26	14	0	4	0
July	30	23	0	4	0
August	30	20	0	3	0
September	21	9	0	3	0
October	9	1	2	3	<1
November	<1	0	11	3	1
December	0	0	22	2	4

How often, not how much — every day in ROLLA MISSOURI S&T’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	2%	20%	6%	18%	2.0–8.7°C
February	5%	22%	7%	23%	3.9–11.5°C
March	18%	28%	11%	32%	9.4–17.9°C
April	37%	31%	12%	38%	17.1–21.9°C
May	58%	32%	14%	42%	22.3–26.8°C
June	71%	28%	12%	31%	26.9–31.5°C
July	77%	23%	10%	22%	29.7–33.8°C
August	77%	22%	10%	23%	28.7–34.1°C
September	73%	22%	10%	21%	24.5–29.8°C
October	50%	22%	9%	23%	18.4–23.7°C
November	16%	22%	9%	21%	9.8–16.3°C
December	3%	21%	6%	20%	3.7–10.2°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.

1908Each stripe is one year’s mean temperature against the 106-year average. Warmest: 2012. Coolest: 1917.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4406909
NOAA station: USC00237263 · ROLLA MISSOURI S&T
Station distance: 14.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 38.00°, 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 ROLLA MISSOURI S&T is what differs

Rolla→Doolittle→Newburg→Table Rock→Arlington→Austria (historical)→

Or put two places side by side: Saint James vs Rolla

Best time to visitSaint James.