Weather CLI

Use the weathercli command to retrieve weather information for any location worldwide.

Commands

Current Weather

Get real-time weather conditions including temperature, humidity, wind, and precipitation.

weathercli current "<location>"
weathercli current "<location>" --json

Returns: Current temperature, "feels like" temperature, humidity %, wind speed/direction, pressure, cloud cover, UV index, precipitation, weather condition description, and timestamp in local timezone.

Forecast

Get daily or hourly weather forecasts.

# Daily forecast (default: 7 days, max: 16)
weathercli forecast "<location>" --days <N>

# Hourly forecast (max: 384 hours)
weathercli forecast "<location>" --hourly --hours <N>

# JSON output for parsing
weathercli forecast "<location>" --json

Returns: For each day/hour: temperature (high/low or current), weather condition, precipitation probability and amount, wind speed/direction, UV index, sunrise/sunset times (daily only).

Location Search

Find coordinates and timezone information for a location.

weathercli search "<location>"
weathercli search "<location>" --json

Returns: Location name, coordinates (lat/lon), country, region/state, timezone.

Location Format

Locations are flexible and geocoded automatically:

• City names: "London", "Tokyo", "New York"
• City + country: "Paris, France", "Berlin, Germany"
• City + state/region: "Portland, Oregon", "Barcelona, Catalonia"
• Ambiguous names: Add country/region for precision

Options

• --json - Output structured JSON (recommended for parsing)
• --no-color - Disable color output (for plain text parsing)
• --days N - Number of days for forecast (1-16, default: 7)
• --hourly - Show hourly instead of daily forecast
• --hours N - Number of hours for hourly forecast (1-384)
• --verbose - Show detailed request information

Output Format

Human-Readable (default)

Color-coded temperatures, formatted with emojis and units. Times shown in location's local timezone.

JSON Structure

Current weather:

{
  "location": {
    "name": "Tokyo",
    "latitude": 35.6895,
    "longitude": 139.6917,
    "country": "Japan",
    "timezone": "Asia/Tokyo"
  },
  "time": "2026-01-12T18:45:00+09:00",
  "temperature": 4.7,
  "apparent": 1.8,
  "humidity": 66,
  "wind_speed": 3.6,
  "wind_direction": 135,
  "condition": "Clear sky",
  "weather_code": 0,
  "precipitation": 0,
  "cloud_cover": 0,
  "pressure": 1015.2,
  "uv_index": 0
}

Forecast:

{
  "location": { ... },
  "daily": [
    {
      "date": "2026-01-12",
      "temp_max": 12.1,
      "temp_min": 4.3,
      "condition": "Slight rain",
      "precip_prob": 75,
      "precipitation": 1.5,
      "sunrise": "2026-01-12T08:04:00+09:00",
      "sunset": "2026-01-12T16:45:00+09:00",
      "wind_speed_max": 15.3,
      "wind_direction": 202,
      "uv_index_max": 2.4
    }
  ]
}

Usage Guidelines

When to Use

• User asks for weather, temperature, forecast, or conditions
• Planning activities and need weather data
• Checking if it will rain, snow, or be sunny
• Getting climate information for travel planning
• Need sunrise/sunset times
• Comparing weather across locations

Location Handling

1. If user provides clear location, use it directly
2. If ambiguous (e.g., "Portland"), ask for clarification or add context
3. If location not found, suggest checking spelling or adding country
4. For coordinates, use search command first to validate

Parsing Output

• Always use --json for programmatic parsing
• Extract temperature, condition, wind_speed for quick summaries
• Check precip_prob for rain likelihood
• Use sunrise/sunset for daylight planning
• weather_code follows WMO standard (0-99)

Best Practices

• Request 3-5 days for travel planning (not full 16)
• Use hourly forecast for detailed day planning
• Check apparent temperature for "feels like" comfort
• UV index >3 = recommend sun protection
• Wind speed >20 km/h = mention it's windy

Examples

Quick weather check:

weathercli current "London" --json | jq '.temperature, .condition'

Week forecast for trip:

weathercli forecast "Barcelona" --days 5 --json

Detailed today's hourly:

weathercli forecast "Seattle" --hourly --hours 24

Check multiple cities:

for city in "Tokyo" "London" "New York"; do
  weathercli current "$city" --json | jq -r '"\(.location.name): \(.temperature)°C, \(.condition)"'
done

Find exact location:

weathercli search "Springfield" --json

Notes

• No API key required - Uses free Open-Meteo API
• Worldwide coverage - Works for any location globally
• Temperatures in Celsius - Convert if needed (°F = °C × 9/5 + 32)
• Wind speed in km/h - Convert to mph if needed (×0.621)
• Local timezone - All times automatically converted
• Rate limits - Reasonable for personal/agent use; avoid hammering
• Accuracy - Data from multiple meteorological sources
• Updates - Current weather updates every 15 minutes
• Offline - Requires internet connection

Error Handling

Location not found:

Error: location not found: Atlantis

→ Check spelling, try adding country/region

Network error:

Error: weather API error: network timeout

→ Retry after brief delay

Invalid input:

Error: invalid days value

→ Check --days is between 1-16

Installation

If weathercli is not available:

# Via Go
go install github.com/pjtf93/weathercli/cmd/weathercli@latest

# Or download binary from releases
# https://github.com/pjtf93/weathercli/releases