{ "openapi": "3.1.1", "info": { "title": "Best Months by Climate Normals API", "version": "1.0.0", "summary": "Typical weather per month from 1991–2020 normals, and the best months for an outdoor job.", "description": "Every endpoint performs the same calculation as the human page and returns inputs, result, units, assumptions, sources, warnings and computedAt. MCP endpoint: /mcp." }, "servers": [ { "url": "https://hearthclimatemonths.usefulweb.app" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Typical weather per month from 1991–2020 normals, and the best months for an outdoor job.", "description": "Finds the nearest weather station with official 1991–2020 climate normals — Deutscher Wetterdienst for Germany, NOAA for the United States — and rates every month for drying laundry, painting, mowing, barbecues or walks from its typical temperature and how often it rains.\n\nMethodology:\n- Germany: the nearest of 1,090 Deutscher Wetterdienst climate stations (within 40 km) from the bundled 1991–2020 multi-annual means — monthly mean temperature, precipitation and sunshine; precipitation and sunshine come from the same station or the nearest one within 15 km.\n- United States: the nearest NOAA NCEI station with 1991–2020 monthly normals, found with the NCEI search service in a box of ±0.4° (then ±1.2°) around the place; daily maximum and minimum temperature, precipitation and days with at least 0.10 inch of precipitation are converted to °C and mm. NCEI answers are cached for 30 days.\n- Each month gets a temperature fit from the mean temperature (0 below the activity’s lower limit, 1 in its ideal band, falling to 0 six degrees above the upper limit) and a dryness: 1 − wet days / days in month (NOAA), or for DWD stations (no wet-day count) the relative sunshine duration n/N — the sunshine normal per day divided by the maximum possible sunshine at mid-month (FAO-56 eq. 34) — or, without a sunshine normal, 1 − precipitation / 150 mm. Score = 100 × fit × dryness.\n- Bands (mean temperature, °C): drying 4–14 ideal to 30; painting 8–15 to 24; mowing 6–12 to 26; barbecue 10–18 to 27; walk −2–10 to 22. The best months are those within 10 points of the top score.\n\nNormals describe the average of 30 years, not next year’s weather. Ratings are a planning heuristic; for the actual day use the forecast tools.", "tags": [ "apps" ], "x-mcp-tool": "hearth_climate_months", "x-owner-app": "hearth", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/HearthClimateMonthsInput" }, "examples": { "example1": { "summary": "Berlin: best months for drying laundry outside", "value": { "place": "52.47, 13.40", "activity": "drying" } }, "example2": { "summary": "Munich: best months to paint the house", "value": { "place": "48.14, 11.58", "activity": "painting" } }, "example3": { "summary": "Hamburg: barbecue months", "value": { "place": "53.55, 9.99", "activity": "bbq" } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/HearthClimateMonthsResult" } } } }, "400": { "description": "Malformed JSON body.", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "422": { "description": "Invalid input (see errors[]).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "429": { "description": "Rate limit exceeded (see Retry-After).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } } } } }, "/api/v1/tool": { "get": { "operationId": "getToolDefinition", "summary": "Inputs, output schema and examples for this tool", "responses": { "200": { "description": "Tool definition.", "content": { "application/json": { "schema": { "type": "object" } } } } } } } }, "components": { "schemas": { "Problem": { "type": "object", "description": "RFC 9457 problem details. 422 responses include per-field `errors`.", "required": [ "type", "title", "status", "detail" ], "properties": { "type": { "type": "string" }, "title": { "type": "string" }, "status": { "type": "integer" }, "detail": { "type": "string" }, "code": { "type": "string" }, "errors": { "type": "array", "items": { "type": "object", "required": [ "field", "message" ], "properties": { "field": { "type": "string" }, "message": { "type": "string" } } } } } }, "HearthClimateMonthsInput": { "type": "object", "additionalProperties": false, "properties": { "place": { "title": "Place (latitude, longitude)", "description": "Decimal degrees such as “52.52, 13.40”, or degrees-minutes-seconds. Rounded to 0.01° (about 1 km) before the request.", "type": "string", "maxLength": 80, "default": "52.52, 13.40" }, "activity": { "title": "Activity", "type": "string", "enum": [ "drying", "painting", "mowing", "bbq", "walk" ], "default": "drying" } }, "required": [ "place" ] }, "HearthClimateMonthsResult": { "type": "object", "additionalProperties": false, "required": [ "schemaVersion", "tool", "computedAt", "inputs", "summary", "result", "units", "assumptions", "sources", "warnings", "presentation", "links" ], "properties": { "schemaVersion": { "type": "string", "const": "1.0" }, "tool": { "type": "object", "additionalProperties": false, "required": [ "id", "name", "version" ], "properties": { "id": { "type": "string" }, "name": { "type": "string" }, "version": { "type": "string" } } }, "computedAt": { "type": "string", "format": "date-time" }, "inputs": { "type": "object", "description": "Normalised inputs actually used, including applied defaults." }, "summary": { "type": "string" }, "result": { "type": "object", "additionalProperties": false, "required": [ "place", "activity", "station", "months", "bestMonths", "attribution" ], "properties": { "place": { "type": "object", "additionalProperties": false, "required": [ "lat", "lon" ], "properties": { "lat": { "type": "number" }, "lon": { "type": "number" } } }, "activity": { "type": "string" }, "station": { "type": "object", "additionalProperties": false, "required": [ "source", "id", "name", "lat", "lon", "distanceKm", "notes" ], "properties": { "source": { "enum": [ "noaa", "dwd" ] }, "id": { "type": "string" }, "name": { "type": "string" }, "lat": { "type": "number" }, "lon": { "type": "number" }, "distanceKm": { "type": "number" }, "notes": { "type": "array", "items": { "type": "string" } } } }, "months": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "month", "tMean", "tMax", "tMin", "precipMm", "wetDays", "sunHours", "score", "temperatureFit", "dryness" ], "properties": { "month": { "type": "integer" }, "tMean": { "type": "number" }, "tMax": { "type": [ "number", "null" ] }, "tMin": { "type": [ "number", "null" ] }, "precipMm": { "type": [ "number", "null" ] }, "wetDays": { "type": [ "number", "null" ] }, "sunHours": { "type": [ "number", "null" ] }, "score": { "type": "integer" }, "temperatureFit": { "type": "number" }, "dryness": { "type": "number" } } } }, "bestMonths": { "type": "array", "items": { "type": "integer" } }, "attribution": { "type": "string" } } }, "units": { "type": "object", "additionalProperties": { "type": "string" } }, "assumptions": { "type": "array", "items": { "type": "string" } }, "sources": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "title" ], "properties": { "title": { "type": "string" }, "url": { "type": "string" }, "publisher": { "type": "string" }, "retrievedAt": { "type": "string" }, "note": { "type": "string" } } } }, "warnings": { "type": "array", "items": { "type": "string" } }, "presentation": { "type": "array", "items": { "type": "object" }, "description": "Display blocks used by the human page (same data)." }, "links": { "type": "object", "additionalProperties": false, "required": [ "human", "api", "openapi", "methodology" ], "properties": { "human": { "type": "string", "format": "uri" }, "api": { "type": "string", "format": "uri" }, "openapi": { "type": "string", "format": "uri" }, "methodology": { "type": "string", "format": "uri" } } } } } } } }