What this chart is doing

Each day gets a vertical temperature range. The current year sits on top of the normal range and the record range since 1981. Rain is cumulative within each month, because a wet month and a one-day cloudburst are not the same thing.

The subtitle is partly automated, but the analysis is not magic. R computes the weather signals first - streaks, records, rain concentration, warm nights, dry runs. The language layer only decides which of those facts deserves the headline.

Blog

The latest three analyses worth keeping around. The full reverse-chronological archive lives on the blog.

Chart showing Bangalore rain peaks in the late afternoon, with a stronger monsoon peak around 4pm.

Bangalore rain has a 4pm habit

The late-afternoon rain clock exists all year, but monsoon makes it much stronger: about 55% of 4pm hours are rainy in monsoon versus about 21% outside it.

Open rain clock chart

Chart showing 2026 as one of Bangalore's driest years through May 23.

Bangalore is dry. That does not make early May a monsoon oracle.

2026 is genuinely dry so far: third-driest through May 23 in the local archive. But first-half May rain has almost no relationship with June-September rain.

Open dry-year chart Open monsoon signal chart

Chart showing Bangalore pre-monsoon rain concentrated in the late afternoon and early evening.

Pre-monsoon rain is an evening creature

April-May rain barely exists before afternoon, then climbs hard into the 5-6pm slot. The southwest monsoon still has an afternoon bump, but it is less fussy about the clock.

Open diurnal chart Open rain-through-year chart

Past years

The same chart works backwards. That is the useful part: once the visual grammar is stable, 2006, 2016, or 2025 can be read against the same normals and records.

Question box

Ask the weather question that has been annoying you.

Not an instant chatbot. That is the point. If people ask good questions - did Whitefield get hotter, did October rain move later, do showers cool nights more than afternoons - I can review them in batches and turn the useful ones into new charts.

Open form in a new tab

The form will collect questions for periodic review. No automatic answers, no surprise token bill, and no pretending every question deserves a generated paragraph.

Data and caveats

The site uses hourly weather data for one Bangalore coordinate from 1981 onward. Recent days can shift slightly after late-arriving corrections, so the updater keeps revisiting the last few days instead of treating yesterday's file as sacred.

There is a separate airport-station sanity check for temperature and wind. Rain is the annoying bit: Bangalore showers are local, and the public station feeds I checked do not give a clean rainfall series. So treat the exact millimetres with more caution than the broad pattern.

Daily chart

Generated by bangalore_weather_update.R, then published into docs/.

Data source

Hourly temperature, rain, wind speed, and wind direction for Bangalore.

Code

Everything is in the GitHub repo.

Bangalore's weather, one year at a time.