visualizedata.org
Find a place

Demo page: real public data, in a page layout that is still being designed. Numbers are as the sources published them on the build date shown at the bottom.

Solomon Islands / Climate

Was September normal in Honiara?

September 2026 · data family: climatedata.dev

Much cooler than normal

25.1°CAverage temperature in Honiara, September 2026

Compare every country's capital: where Solomon Islands ranks for September 2026

Every September in Honiara since 1981September 2026 averaged 25.1°C in Honiara, -0.9°C against its 1991–2020 normal: the 4th coolest September of 46 since 1981.
24.525.025.526.026.527.027.51990200020102020normal 26.0°C2026: 25.1°C
Indicator: Monthly mean air temperature at 2 m, °C, at the capital's coordinates (NASA POWER, MERRA-2); normal = mean of the same month, 1991–2020Source: climatedata.dev world-capitals, version 2026-10-25.06179c5d54; NASA Langley Research Center POWER Project, Monthly and Annual API; capitals from Natural Earth
Show the numbers (46 rows)
YearSeptember average
202625.1°C
202526.5°C
202426.5°C
202326.2°C
202226.6°C
202126.5°C
202026.2°C
201925.5°C
201826.1°C
201726.4°C
201626.3°C
201525.3°C
201426.6°C
201325.9°C
201226.2°C
201126.6°C
201026.5°C
200926.1°C
200826.6°C
200726.4°C
200626.0°C
200526.6°C
200426.1°C
200326.1°C
200225.4°C
200126.1°C
200026.3°C
199926.0°C
199826.3°C
199724.9°C
199626.2°C
199526.3°C
199425.1°C
199325.1°C
199225.8°C
199125.4°C
199025.7°C
198926.0°C
198825.9°C
198726.2°C
198625.6°C
198525.6°C
198426.0°C
198327.0°C
198226.4°C
198127.1°C
The last 12 months against normal8 of the last 12 months were warmer than their 1991–2020 normal and 4 cooler.
-1.0-0.50.0+0.5+1.0Nov2026MarMayJulSep
Indicator: Monthly mean air temperature at 2 m minus that month's 1991–2020 normal, °C (NASA POWER via climatedata.dev)Source: climatedata.dev world-capitals, version 2026-10-25.06179c5d54; NASA Langley Research Center POWER Project, Monthly and Annual API; capitals from Natural Earth
Show the numbers (12 rows)
MonthDifference from normal
Sep 2026-0.9°C
Aug 2026-0.2°C
Jul 2026-0.3°C
Jun 2026+0.1°C
May 2026+0.5°C
Apr 2026+0.5°C
Mar 2026-0.1°C
Feb 2026+0.3°C
Jan 20260.0°C
Dec 2025+0.2°C
Nov 2025+0.8°C
Oct 2025+0.5°C

Get this data

This page's numbers, as JSON:

curl https://visualizedata.org/data/places/slb/climate.json

The climatedata.dev API it comes from (live, no key; every month since 1981 with its normal, anomaly and rank):

curl "https://api.climatedata.dev/v1/world-capitals/tavg/slb.json"

Open the JSON

What this can't tell you

  • This is Honiara, Solomon Islands's capital, not the whole country: one point of NASA POWER's grid (about 50 by 60 km), so a city's own heat island is not in it.
  • MERRA-2 is a reanalysis: a weather model held to observations, not a thermometer reading. Its record starts in 1981, so ranks are among about 45 years, not a century.
  • The latest months are the most likely to be revised.

How the answer is decided

Each month is ranked against the same month in every year since 1981. The top tenth of that record is 'much warmer than normal', the top third 'warmer', the middle third 'near normal'.

Sources