station climatology
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Cape Town

09:00 local
view on polymarket ↗
live obs
20°C
FACT 0700Z
today high so far
20°C
at 09:00
forecast peak27°DWD ICON
climatology alone suggests24°today is running cool for the date
typical further climb+4.0°
observed 09:00 local
usually warmestsunset 19:22
00040812162024 now
chance of each range today's high, live updates with each report
rangeestimatemarket
≤23°C32%0¢
24°C30%1¢
25°C20%10¢
26°C14%17¢
27°C2%36¢
28°C1%32¢
29°C<1%16¢
30°C<1%11¢
31°C<1%1¢
32°C<1%0¢
≥33°C<1%0¢
Our estimate, from JMA's forecast made early this morning (24.0° after taking out its usual 1.9° cold lean here), narrowed by what FACT has reported so far and by how much it usually still climbs after this hour. Replayed on 19 past days (967 station-days): ranges it gave about 30% happened about 30% of the time. Its most likely range came true about a third of the time at 08:00, two thirds at 14:00 and nearly always by 17:00. The market price is the crowd's view; neither is advice.
live temperature, 24h °C local
-4°4°12°20°28°11:0014:0017:0020:0023:0002:0005:0008:00ECMWF 30°CNOW 20°C
-4°4°12°20°28°00:0006:0012:0018:0000:0006:0012:0018:00ECMWF 30°CNOW 20°C
actual dewpoint ecmwf usual range
station report raw METAR FACT, 8 obs
METAR FACT 100700Z 20010KT CAVOK 20/15 Q1019 NOSIG
local temp dew wind cloud wx
09:00 20° 15° 200/10 CAVOK —
08:00 19° 15° 190/13 SCT008 —
07:27 18° 16° 180/11 SCT008 —
07:00 18° 16° 190/12 BKN008 —
06:57 18° 16° 190/12 BKN008 —
06:00 17° 15° 190/11 BKN010 —
05:00 17° 16° 200/12 BKN010 —
04:57 17° 16° 200/12 BKN010 —
current state
✓
METAR 20°C at 09:00 local, inside the usual range for the last 14 days (19°C–22°C) FACT, tracking climatology
↑
This-hour → peak climb median +1.0°C (n=14) — projects to ~21°C @ 14:00 if pattern holds based on noon→peak deltas in 14d window
~
Climb (last ~90min): +1.3°C/h, dewpoint falling (15°C→15°C) drying — accelerates warming
!
Clock test: METAR (20°C @ 09:00) with climatology suggests peak ≥25°C possible 14d records show 5/14 days reached ≥25°C
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Today vs ECMWF: tracking forecast (+0.0°C) ECMWF ens-mean 30°C
stations temperature + wind loading…
cool hot colour = deviation from network median, arrow = wind direction, length = speed

Cloud cover layers — METAR reports the lowest broken/overcast layer first. Higher number = more sky covered.

SKC / CLR / NCDclear sky, no significant clouds
FEW1–2 oktas (12–25% cover), light scatter
SCT3–4 oktas (37–50%), scattered
BKN5–7 oktas (62–87%), broken (mostly cloudy)
OVC8 oktas (100%), overcast
VVvertical visibility (sky obscured by fog/precip)
+CBcumulonimbus suffix, thunderstorm cell
+TCUtowering cumulus, pre-storm vertical development

BKN014 = broken cloud at 1,400 ft. BKN014+CB = broken cloud + cumulonimbus present.

2026-11-10
this hour median 20.0°C usual 19.0°C–22.0°C
typical 14:00 24.0°C usual 21.0°C–25.0°C
noon → peak climb +1.0°C
how hot it gets last 14 days
33°C
14d high, 2026 11 09
avg high24.0°C
usual range21.0°C – 25.0°C
days ≥25°C5 / 14
days ≥26°C3 / 14
days ≥27°C3 / 14
when it peaks where the daily maximum usually lands
11:00–14:00
where the high landed on 80% of days

On dates near this one, this station's daily maximum fell between 11:00 and 14:00 local on 80% of 136 days, most often around 13:00.

The five-year mean curve is highest at 14:00 — that is when the average day is warmest, which runs later than the typical day's own peak.

Use the noon→later climb panel on the right to map current readings to expected peak.

afternoon climb noon to the peak 5-year mean for this date
12:00 → 13:00+0.3°C mean, 5y, n=67
12:00 → 14:00+0.5°C mean, 5y, n=67
12:00 → 15:00+0.1°C mean, 5y, n=67
12:00 → 16:00-0.5°C mean, 5y, n=67
12:00 → 17:00-1.3°C mean, 5y, n=67
12:00 → 18:00-2.6°C mean, 5y, n=66
12:00 → 19:00-3.9°C mean, 5y, n=65
12:00 → 20:00-5.2°C mean, 5y, n=65
today @ 12:00awaiting (now 09:00)
implied peak~24°C (clim) vs ecmwf 30°C
heating passport climb to peak 61 observations per hour, 5 years, ±7 days
20° now at 09:00typically +4.0° more (p90 +7.0°)expected peak 24°peak already set on 3% of days by now
hrtemp remaining climbmean already peaked
0017°+7.7°0%
0117°+7.9°0%
0216°+8.3°0%
0316°+8.6°0%
0416°+8.6°0%
0515°+9.2°0%
0615°+9.2°0%
0717°+7.5°0%
0819°+5.6°0%
0921°+4.0°3%
1022°+2.7°6%
1123°+1.8°18%
1223°+1.0°45%
1324°+0.7°67%
1424°+0.2°88%
1524°+0.1°97%
1623°+0.0°100%
1722°+0.0°100%
1821°+0.0°100%
1919°+0.0°100%
2018°+0.1°100%
2118°+0.1°100%
2217°+0.2°100%
2317°+0.0°100%
cloud regime Sep–Nov, against this date's normal
nowclearnot enough days on record here to say anything about it
coldernormalwarmer
few-1.1°65d
scattered-2.0°73d
broken-2.9°66d
Each bar is the middle half of days (25th–75th percentile) under that sky, with a tick at the mean; the centre line is this station's normal for the date. Sky state is the mean cover across the hours the day warms (09–15 local), not a single reading. An indicator, not a cause — where a sky state is rare it tends to arrive with the system that made it rare, so a large figure is usually the weather pattern showing through the cloud rather than the cloud itself. Greyed rows are not separable from normal.
wind regime Sep–Nov, against this date's normal
nowS at 10kt+0.1° across 192 days (-0.4 to +0.6) — not separable from normal. Treat as no signal today.
coldernormalwarmer
SE+2.0°20d
VARIABLE+1.1°13d
SW+0.9°42d
S+0.1°192d
N-0.4°19d
NW-1.2°80d
W-1.9°10d
Each bar is the middle half of days (25th–75th percentile) for that direction, with a tick at the mean; the centre line is this station's normal for the date. Direction is where the wind came from. An indicator, not a cause -- a direction arrives with a weather system, and it is the system you are seeing. Greyed rows are not separable from normal. ⚠ “now” is the latest single observation, while the history buckets whole days (09–15 local averaged), so today may still finish in a different sector.
hourly profile, 14d median local time
localmedminmaxp25p75
00:00 17°C 15°C 18°C 16°C 18°C
01:00 17°C 15°C 18°C 16°C 18°C
02:00 17°C 14°C 18°C 15°C 18°C
03:00 16°C 12°C 18°C 15°C 17°C
04:00 16°C 11°C 18°C 15°C 17°C
05:00 15°C 10°C 18°C 14°C 16°C
06:00 15°C 10°C 18°C 14°C 16°C
07:00 17°C 14°C 18°C 16°C 18°C
08:00 19°C 14°C 23°C 17°C 19°C
09:00 20°C 15°C 25°C 19°C 22°C
10:00 21°C 18°C 31°C 19°C 22°C
11:00 22°C 18°C 31°C 20°C 24°C
12:00 23°C 18°C 32°C 20°C 25°C
13:00 23°C 19°C 33°C 21°C 25°C
14:00 23°C 19°C 33°C 21°C 25°C
15:00 23°C 19°C 32°C 20°C 25°C
16:00 23°C 19°C 28°C 20°C 25°C
17:00 22°C 18°C 28°C 19°C 24°C
18:00 21°C 18°C 25°C 19°C 23°C
19:00 19°C 17°C 23°C 18°C 21°C
20:00 18°C 16°C 22°C 18°C 19°C
21:00 19°C 16°C 21°C 17°C 19°C
22:00 18°C 15°C 20°C 17°C 18°C
23:00 18°C 15°C 20°C 16°C 18°C
observed highs last 14 days Iowa Environmental Mesonet
11-09 33°C —
11-08 28°C —
11-07 19°C —
11-06 21°C —
11-05 22°C —
11-04 30°C —
11-03 25°C —
11-02 21°C —
11-01 21°C —
10-31 24°C —
10-30 25°C —
10-29 24°C —
10-28 23°C —
10-27 23°C —
forecast record what our morning pick said last 14 days
daymodelsaid highmiss
08-11JMA28°28°-0.3°
07-11JMA18°19°-0.9°
06-11JMA20°21°-0.6°
05-11ECMWF22°22°+0.3°
04-11ECMWF33°30°+2.9°
03-11ECMWF27°25°+2.3°
02-11ECMWF20°21°-0.6°
01-11ECMWF21°21°-0.4°
31-10ECMWF24°24°+0.2°
30-10ECMWF25°25°+0.4°
29-10ECMWF31°24°+6.9°
28-10ECMWF25°23°+1.6°
27-10ECMWF25°23°+1.5°
26-10ECMWF21°21°+0.1°
Each morning the site picks the model that has missed least here lately and takes out its usual lean; this is that forecast, made before the day's heating, beside what the station recorded. Over all 30 scored days: a typical miss of 1.1°, within a degree on 67% of days.
what each model says daily maximum ordered by accuracy at this station
models disagree by10.1°across 7 models today
modeltoday tomorrow its typical miss
DWD ICON26.7°25.5°0.94°most accurate here
ECMWF IFS31.9°25.7°1.02°
CMA GRAPES25.4°26.0°1.07°
Environment Canada GEM29.9°25.4°1.17°
UK Met Office30.6°23.5°1.18°
NOAA GFS28.7°26.0°1.26°
JMA GSM21.8°21.9°2.09°
Ordered by each model's track record at this station, not by a global ranking — the best model is not the same everywhere, and the median gap between a station's best and worst model is 1.2°C. A wide disagreement means the models have found different weather, not that the average of them is right.
model skill which model to trust here vs observed station max
model accuracy typical miss warm / cold within 1°
DWD ICON0.94°+0.05°61%
ECMWF IFS1.02°+0.32°66%
CMA GRAPES1.07°-0.13°66%
Environment Canada GEM1.17°+0.44°55%
UK Met Office1.18°+0.80°63%
NOAA GFS1.26°+0.98°53%
JMA GSM2.09°-2.09°24%
Typical miss is how far off the model usually is, in either direction — lower is better. Warm / cold is which way it leans: a model can be accurate on average and still run consistently warm here. Within 1° is how often it landed inside a degree. Scored against what this station actually recorded, over 38 days.
forecast TAF, valid 10/06Z→11/12Z
forecast max27°at 10/11Zmin 16°issued by the national met service
base10/06Z→11/12Z180° 13kt; 10km+; scattered at 1,200ft
from10/08Z onwards180° 13kt; CAVOK (ceiling and visibility OK); no cloud below 5,000ft
becoming10/16Z→10/18Zbroken at 800ft
becoming10/21Z→10/23Zvariable 3kt
from11/07Z onwards340° 6kt; 10km+; broken at 1,300ft
from11/09Z onwards300° 10kt; 10km+; broken at 2,000ft
TAF FACT 100400Z 1006/1112 18013KT 9999 SCT012 TX27/1011Z TN16/1104Z FM100800 18013KT CAVOK BECMG 1016/1018 BKN008 BECMG 1021/1023 VRB03KT FM110700 34006KT 9999 BKN013 FM110900 30010KT 9999 BKN020
market vs climatology today 67 past days near this date
max market climatology marketclimate days
≤23°C0%46%31/67
24°C1%12%8/67
25°C10%9%6/67
26°C17%6%4/67
27°C36%4%3/67
28°C32%6%4/67
29°C16%7%5/67
30°C11%3%2/67
31°C1%1%1/67
32°C0%1%1/67
≥33°C0%3%2/67
Climatology is what this station actually recorded on this date across five years of IEM observations, bucketed on the rounded whole degree exactly as the market settles. It is a base rate, not a forecast — it knows nothing about today's weather, and the market does. Where the two differ, the market usually has the better information. Market column sums to 125% and climatology to 100%.